fix e2e workflow to run on release branches

Author: itsankit-google

.github/workflows/e2e.yml

@@ -16,9 +16,9 @@ name: Build e2e tests
 
 on:
   push:
-    branches: [ develop ]
+    branches: [ develop, release/* ]
   pull_request:
-    branches: [ develop]
+    branches: [ develop, release/*]
     types: [opened, synchronize, reopened, labeled]
   workflow_dispatch:
 
@@ -61,6 +61,7 @@ jobs:
         with:
           repository: cdapio/cdap-e2e-tests
           path: e2e
+          ref: release/6.11
       - name: Cache
         uses: actions/cache@v4
         with: