Bump hashicorp/setup-terraform from 3 to 4

Bumps [hashicorp/setup-terraform](https://github.com/hashicorp/setup-terraform) from 3 to 4.
- [Release notes](https://github.com/hashicorp/setup-terraform/releases)
- [Changelog](https://github.com/hashicorp/setup-terraform/blob/main/CHANGELOG.md)
- [Commits](hashicorp/setup-terraform@v3...v4)

---
updated-dependencies:
- dependency-name: hashicorp/setup-terraform
  dependency-version: '4'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/infra.yaml

@@ -31,7 +31,7 @@ jobs:
           credentials_json: ${{ secrets.GCP_SA_KEY }}
 
       - name: Set up Terraform
-        uses: hashicorp/setup-terraform@v3
+        uses: hashicorp/setup-terraform@v4
 
       - name: Initialize Terraform
         run: |