bump(angular-language-server): update to v21 (#12407)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

packages/angular-language-server/package.yaml

@@ -12,7 +12,7 @@ categories:
   - LSP
 
 source:
-  id: pkg:npm/%40angular/language-server@20.3.0
+  id: pkg:npm/%40angular/language-server@21.0.1
   extra_packages:
     - [email protected]