Bump actions/setup-dotnet from 4 to 5

Bumps [actions/setup-dotnet](https://github.com/actions/setup-dotnet) from 4 to 5.
- [Release notes](https://github.com/actions/setup-dotnet/releases)
- [Commits](https://github.com/actions/setup-dotnet/compare/v4...v5)

---
updated-dependencies:
- dependency-name: actions/setup-dotnet
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/default_plugins.yml

@@ -12,7 +12,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - name: Setup .NET
-        uses: actions/setup-dotnet@v4
+        uses: actions/setup-dotnet@v5
         with:
           dotnet-version: 9.0.x
 

.github/workflows/dotnet.yml

@@ -29,7 +29,7 @@ jobs:
             "**/SolutionAssemblyInfo.cs"
           version: ${{ env.FlowVersion }}.${{ env.BUILD_NUMBER }}
       - name: Setup .NET
-        uses: actions/setup-dotnet@v4
+        uses: actions/setup-dotnet@v5
         with:
           dotnet-version: 9.0.x
 #          cache: true