Update release build to latest upload-artifact action

Author: GJKrupa

.github/workflows/release.yaml

@@ -42,7 +42,7 @@ jobs:
         run: |
           cp target/${{ matrix.job.target }}/release/manplan manplan-${{ matrix.job.exe }}
       - name: Archive production artifacts
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: binary
           path: manplan-${{ matrix.job.exe }}