Bump actions/setup-dotnet from 2.1.0 to 4.0.0 (#1)

Bumps [actions/setup-dotnet](https://github.com/actions/setup-dotnet) from 2.1.0 to 4.0.0.
- [Release notes](https://github.com/actions/setup-dotnet/releases)
- [Commits](actions/setup-dotnet@v2.1.0...v4.0.0)

---
updated-dependencies:
- dependency-name: actions/setup-dotnet
  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/pr_validation.yaml

@@ -29,7 +29,7 @@ jobs:
           fetch-depth: 0
 
       - name: "Install .NET SDK"
-        uses: actions/setup-dotnet@v2.1.0
+        uses: actions/setup-dotnet@v4.0.0
         with:
           dotnet-version: |
             8.0.x