fix: restore rxjs override in igx-ts-legacy reveal-sdk-wrappers-angular

Co-authored-by: Lipata <2621802+Lipata@users.noreply.github.com>

Author: Copilot

packages/igx-templates/igx-ts-legacy/projects/_base/files/package.json

@@ -29,7 +29,8 @@
   "overrides": {
     "reveal-sdk-wrappers-angular": {
       "@angular/core": "^21.0.0",
-      "@angular/common": "^21.0.0"
+      "@angular/common": "^21.0.0",
+      "rxjs": "~7.8.1"
     }
   },
   "devDependencies": {