Update public.ecr.aws/artifacthub/ah Docker tag to v1.19.0

Author: renovate[bot]

.github/workflows/helm-lint-and-test.yaml

@@ -10,7 +10,7 @@ jobs:
   linter-artifacthub:
     runs-on: ubuntu-latest
     container:
-      image: public.ecr.aws/artifacthub/ah:v1.17.0
+      image: public.ecr.aws/artifacthub/ah:v1.19.0
       options: --user 1001
     steps:
       - name: Checkout