docs(location-alpha): fix typos (#33024)

### Issue # (if applicable)

None

### Reason for this change

Fixed typos in code comments.

### Checklist
- [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: andyu17

packages/@aws-cdk/aws-location-alpha/lib/map.ts

@@ -52,7 +52,7 @@ export interface MapProps {
   /**
    * Specifies the custom layers for the style.
    *
-   * @default - no custom layes
+   * @default - no custom layers
    */
   readonly customLayers?: CustomLayer[];
 

packages/@aws-cdk/aws-location-alpha/test/tracker.test.ts

@@ -126,7 +126,7 @@ test('grant update device positions action', () => {
   }));
 });
 
-test('grant resd device positions actions', () => {
+test('grant read device positions actions', () => {
   const tracker = new Tracker(stack, 'Tracker', {});
 
   const role = new iam.Role(stack, 'Role', {