Fix push release to OCI

Author: wchomik

.github/workflows/gh-pages-release.yml

@@ -30,5 +30,7 @@ jobs:
 
       - name: Upload to OCI-based registry
         run: |
-          helm registry login ghcr.io -u ${{ github.actor }} -p ${{ secrets.GITHUB_TOKEN }}
-          find .cr-release-packages/ -name *.tgz -exec helm push oci://ghcr.io/openmcp-project {} \;
+          if [ -d ".cr-release-packages" ]; then
+            helm registry login ghcr.io -u ${{ github.actor }} -p ${{ secrets.GITHUB_TOKEN }}
+            find .cr-release-packages/ -name *.tgz -exec helm push {} oci://ghcr.io/openmcp-project \;
+          fi