Bump actions/upload-artifact from 4 to 5

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

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

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

.github/workflows/dotnet.yaml

@@ -167,12 +167,12 @@ jobs:
     - name: Pack
       run: nix develop --command dotnet pack --configuration Release
     - name: Upload NuGet artifact (plugin)
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v5
       with:
         name: nuget-package-plugin
         path: WoofWare.Myriad.Plugins/bin/Release/WoofWare.Myriad.Plugins.*.nupkg
     - name: Upload NuGet artifact (attributes)
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v5
       with:
         name: nuget-package-attribute
         path: WoofWare.Myriad.Plugins.Attributes/bin/Release/WoofWare.Myriad.Plugins.Attributes.*.nupkg