build(deps): bump terraform-linters/setup-tflint from 3 to 4

Bumps [terraform-linters/setup-tflint](https://github.com/terraform-linters/setup-tflint) from 3 to 4.
- [Release notes](https://github.com/terraform-linters/setup-tflint/releases)
- [Commits](terraform-linters/setup-tflint@v3...v4)

---
updated-dependencies:
- dependency-name: terraform-linters/setup-tflint
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/pr-validation.yaml

@@ -57,7 +57,7 @@ jobs:
       uses: hashicorp/[email protected]
 
     - name: Setup TFLint
-      uses: terraform-linters/setup-tflint@v3
+      uses: terraform-linters/setup-tflint@v4
 
     - name: Terraform Format
       id: fmt