Bump actions/upload-artifact from 5 to 6 in the all group

Bumps the all group with 1 update: [actions/upload-artifact](https://github.com/actions/upload-artifact).


Updates `actions/upload-artifact` from 5 to 6
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v5...v6)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: all
...

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

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -40,7 +40,7 @@ jobs:
           dotnet test -c Release --logger "console;verbosity=normal" --logger "trx;LogFilePrefix=results" -m
 
       - name: Upload test results trx files
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: success() || failure()
         with:
           name: test-results