chore(deps): update terraform-docs/gh-actions action to v1.4.0

Author: renovate[bot]

.github/workflows/documentation.yaml

@@ -22,7 +22,7 @@ jobs:
 
       - name: Render terraform docs inside the main and the modules README.md files and push changes back to PR branch
         id: terraform-docs
-        uses: terraform-docs/gh-actions@v1.3.0
+        uses: terraform-docs/gh-actions@v1.4.0
         with:
           find-dir: .
           args: --sort-by required