Pinned specific version of checkout

no ref

- The only real desire here is to make the renovate PRs a bit easier and nicer to reach
- If we don't specify the exact version it creates PRs that are a bit confusing and aren't clear that its bumping a minor version

.github/workflows/shellcheck.yml

@@ -12,6 +12,6 @@ jobs:
     name: ShellCheck
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+      - uses: actions/checkout@v4.3.0
       - name: Run ShellCheck
         run: find . -type f -name "*.sh" -exec shellcheck {} +