Release charts manually

This replicates the process used in the old Travis configuration to
publish updated charts.

Signed-off-by: Stephen Kitt <skitt@redhat.com>

.github/workflows/release.yml

@@ -21,7 +21,12 @@ jobs:
           git config user.name "$GITHUB_ACTOR"
           git config user.email "$GITHUB_ACTOR@users.noreply.github.com"
 
-      - name: Run chart-releaser
-        uses: helm/chart-releaser-action@v1.1.0
-        env:
-          CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+      - name: Update the charts
+        run: |
+          make release
+
+      - name: Push the charts
+        run: |
+          git add charts/*
+          git commit -m "Chart update"
+          git push