Update actions/upload-artifact version

Author: pragma37

.github/workflows/BlenderMalt.yml

@@ -88,7 +88,7 @@ jobs:
         shutil.make_archive('BlenderMalt', 'zip', '.', 'BlenderMalt')
     
     - name: Upload Artifact
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         name: BlenderMalt-${{ runner.os }}
         path: ${{ github.workspace }}/BlenderMalt.zip