Update jnorwood/helm-docs Docker tag to v1.14.2

Author: renovate[bot]

.github/workflows/test-helm.yaml

@@ -80,4 +80,4 @@ jobs:
         uses: actions/checkout@v4.1.7
 
       - name: Run helm-docs
-        uses: docker://jnorwood/helm-docs:v1.13.1
+        uses: docker://jnorwood/helm-docs:v1.14.2