chore: update grid performance to angular 21

Author: zstoyanova9

.github/workflows/ci.yml

@@ -70,6 +70,12 @@ jobs:
  npm ci
  npm run build
 
+ - name: Build Grid Performance app
+ working-directory: ./examples-standalone/grid-performance
+ run: |
+ npm ci
+ npm run build
+
  - name: Translation of Messages
  working-directory: ./examples-standalone/integration-i18n
  run: |