Update dependency @luigi-project/client-support-angular to v21

Author: renovate[bot]

package.json

@@ -39,7 +39,7 @@
     "@angular/platform-browser-dynamic": "^19.2.16 || ^20.3.14",
     "@angular/router": "^19.2.16 || ^20.3.14",
     "@luigi-project/client": "^2.25.1",
-    "@luigi-project/client-support-angular": "^2.22.1 || ^20.0.1",
+    "@luigi-project/client-support-angular": "^2.22.1 || ^20.0.1 || ^21.0.0",
     "@luigi-project/core": "^2.25.1",
     "@luigi-project/plugin-auth-oauth2": "^2.25.1",
     "@ui5/webcomponents-ngx": "^0.4.8 || ^0.5.8",