message: docs: update release notes to include Ivy enabled by default in breaking changes
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diff: ### BREAKING CHANGES
  +Angular now compiles with Ivy by default ([#32219](https://github.com/angular/angular/issues/32219)) ([ec4381d](https://github.com/angular/angular/commit/ec4381d)).
  +
  +If you aren't familiar with Ivy, read our [blog post about the Ivy preview](https://blog.angular.io/its-time-for-the-compatibility-opt-in-preview-of-ivy-38f3542a282f?gi=8bfeb44b05c) and see the list of changes [here](https://docs.google.com/document/d/1Dije0AsJ0PxL3NaeNPxpYDeapj30b_QC0xfeIvIIzgg/preview).
  +
  * **ivy:** make Hammer support tree-shakable. Previously, in Ivy applications, Hammer providers were included by default. With this commit, apps that want Hammer support must import `HammerModule`in their root module. ([#32203](https://github.com/angular/angular/issues/32203)) ([de8ebbd](https://github.com/angular/angular/commit/de8ebbd))
  