dependencies: bump terraform-docs/gh-actions from 1.0.0 to 1.4.0

Bumps [terraform-docs/gh-actions](https://github.com/terraform-docs/gh-actions) from 1.0.0 to 1.4.0.
- [Release notes](https://github.com/terraform-docs/gh-actions/releases)
- [Commits](terraform-docs/gh-actions@v1.0.0...v1.4.0)

---
updated-dependencies:
- dependency-name: terraform-docs/gh-actions
  dependency-version: 1.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/readme-generator.yml

@@ -21,15 +21,15 @@ jobs:
           ref: ${{ github.event.pull_request.head.ref }}
 
       - name: AWS docs
-        uses: terraform-docs/gh-actions@v1.0.0
+        uses: terraform-docs/gh-actions@v1.4.0
         with:
           working-dir: ./AWS/
           git-push: true
           output-file: README.MD
           config-file: ".terraform-docs.yml"
 
       - name: GCP docs
-        uses: terraform-docs/gh-actions@v1.0.0
+        uses: terraform-docs/gh-actions@v1.4.0
         with:
           working-dir: ./GCP/
           git-push: true