add breaking change indicator

Author: jaffrepaul

docs/guides/references/migration-guide.mdx

@@ -48,7 +48,7 @@ Whether Cypress will process, compress, and upload videos to Cypress Cloud even
 
 See our [Control which videos to keep and upload to Cypress Cloud](/guides/guides/screenshots-and-videos#Control-which-videos-to-keep-and-upload-to-Cypress-Cloud) guide with code examples to discard captured video of passing tests.
 
-#### `videoCompression` is set to false by default
+#### <Icon name="exclamation-triangle" color="red" /> Breaking Change: `videoCompression` is set to false by default
 
 The quality setting for the video compression.