Bump actions/upload-artifact from 6 to 7

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 6 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v6...v7)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/build.yml

@@ -35,7 +35,7 @@ jobs:
     - name: Test
       run: dotnet test --no-build --verbosity normal --logger trx --results-directory "TestResults"
     - name: Upload test results
-      uses: actions/upload-artifact@v6
+      uses: actions/upload-artifact@v7
       with:
         name: dotnet-results
         path: TestResults
@@ -57,7 +57,7 @@ jobs:
       run: echo "VERSION=$(git describe --tags --dirty)" >> $GITHUB_ENV
     - name: Pack
       run: dotnet pack --output ./artifacts --configuration Release -p:Version=$VERSION
-    - uses: actions/upload-artifact@v6
+    - uses: actions/upload-artifact@v7
       with:
         name: artifacts
         path: ./artifacts