Use branch name instead of version for trivy-action

Use the branch name instead of the version of the trivy-action action
based on their documentation, as GitHub Actions is reporting that it is
unable to find v0.14.0.

.github/workflows/terraform-checks.yaml

@@ -189,7 +189,7 @@ jobs:
           git-commit-message: Syncing terraform-docs update for ${{ inputs.working-directory }}/README.md
 
       - name: Run trivy against the ${{ inputs.type }}
-        uses: aquasecurity/trivy-action@v0.14.0
+        uses: aquasecurity/trivy-action@master
         with:
           github-pat: ${{ secrets.GITHUB_TOKEN }}
           trivy-config: .trivy.yaml