add lint chart action

.github/workflows/lint-charts.yaml

@@ -0,0 +1,23 @@
+name: Lint Charts
+
+on:
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  lint-charts:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Install Helm
+        uses: azure/setup-helm@v3
+        with:
+          version: v3.10.2
+
+      - name: Lint charts
+        run: helm lint charts/*