docs(gatsby-remark-images): Fix description of showCaptions (#16442)

The `showCaptions` array option’s documentation was the wrong way around. [gatsby-remark-images]

Author: akselinurmio

packages/gatsby-remark-images/README.md

@@ -48,7 +48,7 @@ plugins: [
 | ---------------------- | ------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
 | `maxWidth`             | `650`   | The `maxWidth` in pixels of the div where the markdown will be displayed. This value is used when deciding what the width of the various responsive thumbnails should be.                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
 | `linkImagesToOriginal` | `true`  | Add a link to each image to the original image. Sometimes people want to see a full-sized version of an image e.g. to see extra detail on a part of the image and this is a convenient and common pattern for enabling this. Set this option to false to disable this behavior.                                                                                                                                                                                                                                                                                                                                                    |
-| `showCaptions`         | `false` | Add a caption to each image with the contents of the title attribute, when this is not empty. If the title attribute is empty but the alt attribute is not, it will be used instead. Set this option to true to enable this behavior. You can also pass an array instead to specify which value should be used for the caption — for example, passing `['alt', 'title']` would use the alt attribute first, and then the title. When this is set to `true` it is the same as passing `['title', 'alt']`. If you just want to use the title (and omit captions for images that have titles but no alt attribute), pass `['title']`. |
+| `showCaptions`         | `false` | Add a caption to each image with the contents of the title attribute, when this is not empty. If the title attribute is empty but the alt attribute is not, it will be used instead. Set this option to true to enable this behavior. You can also pass an array instead to specify which value should be used for the caption — for example, passing `['alt', 'title']` would use the alt attribute first, and then the title. When this is set to `true` it is the same as passing `['title', 'alt']`. If you just want to use the title (and omit captions for images that have alt attributes but no title), pass `['title']`. |
 | `sizeByPixelDensity`   | `false` | Analyze images' pixel density to make decisions about target image size. This is what GitHub is doing when embedding images in tickets. This is a useful setting for documentation pages with a lot of screenshots. It can have unintended side effects on high pixel density artworks.<br /><br />Example: A screenshot made on a retina screen with a resolution of 144 (e.g. Macbook) and a width of 100px, will be rendered at 50px.                                                                                                                                                                                           |
 | `wrapperStyle`         |         | Add custom styles to the div wrapping the responsive images. Use the syntax for the style attribute e.g. `margin-bottom:10px; background: red;` or a function returning a style string which receives the information about the image you can use to dynamically set styles based on the aspectRatio for example.                                                                                                                                                                                                                                                                                                                  |
 | `backgroundColor`      | `white` | Set the background color of the image to match the background image of your design.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |