Bump actions/checkout from 3.4.0 to 4.1.1 (#12)

Bumps [actions/checkout](https://github.com/actions/checkout) from 3.4.0 to 4.1.1.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v3.4.0...v4.1.1)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/main.yml

@@ -12,7 +12,7 @@ jobs:
       SPECKLE_AUTOMATE_URL: https://automate.speckle.dev
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3.4.0
+      - uses: actions/checkout@v4.1.1
       - name: Setup .NET Core SDK
         uses: actions/setup-dotnet@v3.2.0
         with: