Added chart lint test github actions workflow.

.github/workflows/lint-test.yml

@@ -0,0 +1,20 @@
+name: Lint test helm charts
+
+on: commit
+
+jobs:
+  lint-test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Set up helm
+        uses: azure/setup-helm@v1
+        with:
+          version: v3.8.1
+
+      - name: Run helm lint
+        run: helm lint grocy