Format docs

Author: tido64

docs/ios.metalAPIValidation.md

@@ -2,8 +2,10 @@ The API Validation layer checks for code that calls the Metal API incorrectly,
 including errors in creating resources, encoding Metal commands, and performing
 other common tasks.
 
-> **_NOTE:_** The API Validation layer has a small, but measureable, impact on
-> CPU performance.
+> [!NOTE]
+>
+> The API validation layer has a small, but measureable, impact on CPU
+> performance.
 
 For more details, read Apple's documentation on
 [Validating your app’s Metal API usage](https://developer.apple.com/documentation/xcode/validating-your-apps-metal-api-usage/).