message: docs(migration): add browserslist content
diff: @@ -397,6 +397,16 @@ Ensure `null` is not passed in as a value to the `placeholder` property. We reco
  The list of browsers that Ionic supports has changed. Review the [Browser Support Guide](../reference/browser-support) to ensure you are deploying apps to supported browsers.
  +If you have a `browserslist` or `.browserslistrc` file, update it with the following content:
  +
  +```
  +Chrome >=60
  +Firefox >=63
  +Edge >=79
  +Safari >=13
  +iOS >=13
  +```
  +
  ### Testing
  