update GHA branch to correct branch (#638)

Author: rahulait

.github/workflows/e2e-upgrade-test.yaml

@@ -3,9 +3,7 @@ name: Run e2e upgrade test
 on:
   push:
     branches:
-      - test-upgrade
-    tags:
-      - "*"
+      - main
   workflow_dispatch:
 
 permissions: