Update terraform-docs/gh-actions action to v1.4.0

Author: renovate[bot]

.github/workflows/main.yml

@@ -51,7 +51,7 @@ jobs:
           ref: ${{ github.event.pull_request.head.ref }}
 
       - name: Generate Terraform docs
-        uses: terraform-docs/gh-actions@v1.2.0
+        uses: terraform-docs/gh-actions@v1.4.0
         with:
           working-dir: .
           config-file: .terraform-docs.yml