chore(deps): update dependency @angular/platform-server@>=20.0.0-next.0 <20.3.19 to v21 [security]

Author: renovate[bot]

package.json

@@ -121,7 +121,7 @@
       "brace-expansion@>=4.0.0 <5.0.5": "^5.0.5",
       "yaml@>=2.0.0 <2.8.3": "^2.8.3",
       "follow-redirects@<=1.15.11": ">=1.16.0",
-      "@angular/platform-server@>=20.0.0-next.0 <20.3.19": "^20.3.19",
+      "@angular/platform-server@>=20.0.0-next.0 <20.3.19": "^21.0.0",
       "stylelint-config-recommended-vue@1.6.1>stylelint-config-recommended": "^16.0.0",
       "uuid@<14.0.0": "~14.0.0",
       "postcss@<8.5.10": "8.5.10",