chore(deps): update actions/checkout action to v6 (#137)

* chore(deps): update actions/checkout action to v6

* docs: update terraform-docs for modules

---------

Co-authored-by: Steve McGhee <smcghee@google.com>

Author: renovate-bot

.github/workflows/terraform-checks.yaml

@@ -8,7 +8,7 @@ jobs:
     name: Format Check
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-go@v6
       - uses: hashicorp/setup-terraform@v3
       - run: go install github.com/terraform-docs/terraform-docs@v0.18.0