CI: align release_helm_and_notify Go toolchain with go.work (#7552)

* Initial plan

* ci: use go.work version in release helm workflow

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

Author: Copilot

.github/workflows/docker-release2.yml

@@ -290,6 +290,8 @@ jobs:
 
     - name: Setup Go
       uses: actions/setup-go@v6
+      with:
+        go-version-file: go.work
 
     - name: Update helm chart
       if: env.IS_PRERELEASE != 'true'