chore(ci): add losisin/helm-values-schema-json-action

.gitea/workflows/test-pr.yml

@@ -47,3 +47,16 @@ jobs:
           git diff --exit-code --name-only README.md
       - name: yaml lint
         uses: https://github.com/ibiqlik/action-yamllint@v3
+
+  helm-schema-values:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        ref: ${{ github.event.pull_request.head.ref }}
+    - name: Generate values schema json
+      uses: losisin/helm-values-schema-json-action@v1.8.0
+      with:
+        input: values.yaml
+    - name: Verify values.schema.json
+      run: git diff --exit-code --name-only values.schema.json