test helm publication on ghcr

Signed-off-by: Maxime Fournioux <55544262+mfournioux@users.noreply.github.com>

.github/workflows/publish-helm-ghcr.yaml

@@ -2,9 +2,6 @@ name: Publish Helm chart on Github Registry
 
 # Configures this workflow to run every time a change is pushed to the branch called `main`.
 on:
-  push:
-    branches:
-      - main
   pull_request:
 env:
   CHART_NAME: chart-vllm
@@ -29,7 +26,7 @@ jobs:
           version: v3.14.4
 
       - name: helm login
-        run:  echo ${{ secrets.GITHUB_TOKEN }} | helm registry login ghcr.io -u $ --password-stdin
+        run:  echo ${{ secrets.GITHUB_TOKEN }} | helm registry login ghcr.io -u mfournioux --password-stdin
 
       - name: get helm chart version
         run:  echo "CHART_TAG=$(helm show chart examples/online_serving/chart-helm | awk '/version/ {print $2}')" >> "$GITHUB_ENV"