ci(deps): bump actions/upload-artifact from 5 to 6

Bumps [actions/upload-artifact](https://github.com/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
...

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

Author: dependabot[bot]

.github/workflows/build.yml

@@ -224,7 +224,7 @@ jobs:
 
 
     - name: "Upload: Repository Zip"
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       if: runner.os == 'Linux' && matrix.target-platform == 'oldest'
       with:
         name: org.eclipse.tm4e.repository-${{matrix.target-platform}}-${{matrix.os}}