helm: show diff on lint failure

Author: skrobul

Diff for: .github/workflows/helm-charts-lint.yaml

@@ -21,8 +21,13 @@ jobs:
         uses: gabe565/[email protected]
       - name: Generate documentation
         uses: losisin/[email protected]
+        id: generate
         with:
           chart-search-root: "helm-charts/"
           # ensures that no value changes are committed without updating the
           # documentation.
           fail-on-diff: true
+      - name: Show diff
+        if: ${{ failure() && steps.generate.conclusion == "failure" }}
+        run:
+          git diff