Bump actions/checkout from 3.6.0 to 4.0.0

Bumps [actions/checkout](https://github.com/actions/checkout) from 3.6.0 to 4.0.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3.6.0...v4.0.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/ci.yml

@@ -27,7 +27,7 @@ jobs:
         shell: pwsh
         run: exit $(If ($env:SECRETS_AVAILABLE -eq 'true') { 0 } Else { 1 })
       - name: Checkout
-        uses: actions/checkout@v3.6.0
+        uses: actions/checkout@v4.0.0
         with:
           fetch-depth: 0
       - name: Setup .NET SDK

.github/workflows/release.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v3.6.0
+        uses: actions/checkout@v4.0.0
         with:
           fetch-depth: 0
       - name: Setup .NET SDK