chore: update release notes for clarity

Author: mrstork

CHANGELOG.md

@@ -5,7 +5,7 @@
 
 ### Bug Fixes
 
-* support angular@21 ([#401](https://github.com/netlify/angular-runtime/issues/401)) ([8a130c8](https://github.com/netlify/angular-runtime/commit/8a130c874882615dd27d8b0ef28d3dfff10fb1ff))
+* support angular@21 RC1 ([#401](https://github.com/netlify/angular-runtime/issues/401)) ([8a130c8](https://github.com/netlify/angular-runtime/commit/8a130c874882615dd27d8b0ef28d3dfff10fb1ff))
 
 ## [3.0.0](https://github.com/netlify/angular-runtime/compare/v2.4.0...v3.0.0) (2025-08-14)