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] <[email protected]>

Author: dependabot[bot]

.github/workflows/CI_build.yml

@@ -26,7 +26,7 @@ jobs:
           ZIPCMD: 7z a -tzip
 
     - name: Archive
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
           name: Explorer-${{ matrix.build_configuration }}-${{ matrix.build_platform }}
           path: build\bin\${{ matrix.build_platform }}\${{ matrix.build_configuration }}\Explorer.dll