Add new appkit release

This has the modals we need for the subtitle upload

package.json

@@ -8,7 +8,7 @@
     "@fontsource-variable/roboto-flex": "^5.0.3",
     "@iarna/toml": "^2.2.5",
     "@mui/material": "^5.15.2",
-    "@opencast/appkit": "^0.2.4",
+    "@opencast/appkit": "^0.3.0",
     "@reduxjs/toolkit": "^2.0.1",
     "@testing-library/jest-dom": "^6.1.6",
     "@types/iarna__toml": "^2.0.5",