message: docs: add release notes for v11.2.8 to CHANGELOG
  This commit cherry-picks the v11.2.8 release notes from
  onto master.
  Fixes
  PR Close
diff: @@ -32,6 +32,15 @@ import {XhrFactory} from '@angular/common';
  +## 11.2.8 (2021-04-01)
  +
  +
  +### Bug Fixes
  +
  +* **compiler:** handle case-sensitive CSS custom properties ([#41380](https://github.com/angular/angular/issues/41380)) ([f9da272](https://github.com/angular/angular/commit/f9da27214b74d60d398cf46493767711e710635c)), closes [#41364](https://github.com/angular/angular/issues/41364)
  +
  +
  +
  # 12.0.0-next.6 (2021-03-24)
  