update upload artifact action

Author: redthing1

.github/workflows/windows.yml

@@ -61,7 +61,7 @@ jobs:
         dir
         7z a rengfx_win_builddir.7z .
     - name: 'Upload Artifacts'
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v3
       with:
         name: rengfx-win-builddir
         path: rengfx_win_builddir.7z