Fix artifacts upload

Author: TheAssassin

.github/workflows/main.yml

@@ -29,8 +29,8 @@ jobs:
       - name: Archive artifacts
         uses: actions/upload-artifact@v2
         with:
-          name: AppImage
-          path: linuxdeploy-plugin-qt-"$ARCH".AppImage*
+          name: AppImage ${{ matrix.ARCH }}
+          path: linuxdeploy-plugin-qt-${{ matrix.ARCH }}.AppImage*
 
   upload:
     name: Create release and upload artifacts