CI: fix helm push step

Author: benbz

.github/workflows/releasing.yml

@@ -78,7 +78,7 @@ jobs:
 
     - name: Helm push
       if: ${{ github.event_name != 'pull_request' }}
-      run: helm push matrix-stack-*.tgz oci://ghcr.io/${{ github.repository }}
+      run: helm push charts/matrix-stack/matrix-stack-*.tgz oci://ghcr.io/${{ github.repository }}
 
     - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02  # v4
       with:

newsfragments/590.changed.md

@@ -0,0 +1 @@
+Don't push chart OCI images for every PR.