add chart release workflow

.github/configs/cr.yaml

@@ -0,0 +1,5 @@
+## Reference: https://github.com/helm/chart-releaser/blob/main/pkg/config/config.go#L40-L65
+index-path: "./index.yaml"
+release-name-template: "{{ .Name }}-chart-v{{ .Version }}"
+generate-release-notes: true
+skip-existing: true

.github/workflows/chart.yml

@@ -0,0 +1,29 @@
+name: Publish Chart
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  publish:
+    name: Publish Helm Chart
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Configure Git
+        run: |
+          git config user.name "$GITHUB_ACTOR"
+          git config user.email "$GITHUB_ACTOR@users.noreply.github.com"
+
+      - name: Run chart-releaser
+        id: release
+        uses: helm/chart-releaser-action@v1.5.0
+        with:
+          config: "./.github/configs/cr.yaml"
+        env:
+          CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"