Merge pull request #3714 from NativeScript/tachev/fix-extending-cli-url

docs: fix extending CLI url in the readme

Author: Dimitar Tachev

README.md

@@ -412,7 +412,7 @@ The NativeScript CLI lets you extend its behavior and customize it to fit your n
 
 When you run one of the extendable commands (for example, `tns build`), the CLI checks for hooks and executes them. Plugins can also use hooks to control the compilation of the application package.
 
-For more information, see the [Extending the CLI document](https://github.com/NativeScript/nativescript-cli/blob/production/extending-cli.md)
+For more information, see the [Extending the CLI document](https://github.com/NativeScript/nativescript-cli/blob/master/extending-cli.md)
 
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