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

Bumps the actions 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: actions
...

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

Author: dependabot[bot]

.github/workflows/publish-client.yml

@@ -33,7 +33,7 @@ jobs:
           cd ../..
 
       - name: Upload Build Artifact
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: webui-wasm-client
           path: ./publish

.github/workflows/publish-server.yml

@@ -41,13 +41,13 @@ jobs:
           cd ../..
 
       - name: Upload DEB Build Artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: 'Server DEB build.zip'
           path: ./publish/*.linux-x64.deb
 
       - name: Upload RPM Build Artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: 'Server RPM build.zip'
           path: ./publish/*.linux-x64.rpm