Bump actions/setup-dotnet from 2 to 4

Bumps [actions/setup-dotnet](https://github.com/actions/setup-dotnet) from 2 to 4.
- [Release notes](https://github.com/actions/setup-dotnet/releases)
- [Commits](actions/setup-dotnet@v2...v4)

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

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

.github/workflows/test-and-publish.yml

@@ -19,7 +19,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Setup .NET
-      uses: actions/setup-dotnet@v2
+      uses: actions/setup-dotnet@v4
       with:
         dotnet-version: |
           6.0.x
@@ -41,7 +41,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Setup .NET
-      uses: actions/setup-dotnet@v2
+      uses: actions/setup-dotnet@v4
       with:
         dotnet-version: |
           6.0.x
@@ -76,7 +76,7 @@ jobs:
   #     with:
   #       fetch-depth: 0 # We need to fetch the entire Git history in order to verify the authenticity.
   #   - name: Setup .NET
-  #     uses: actions/setup-dotnet@v2
+  #     uses: actions/setup-dotnet@v4
   #     with:
   #       dotnet-version: |
   #         6.0.x