chore(deps): bump actions/checkout from 5 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/tfsec.yaml

@@ -18,7 +18,7 @@ jobs:
       security-events: write
     steps:
     - name: Clone repo
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
     - name: Run tfsec
       uses: aquasecurity/tfsec-sarif-action@master
       with:
@@ -33,7 +33,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Clone repo
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
     - name: Setup Terraform
       uses: hashicorp/setup-terraform@v3
       with: