Fix resolutions

Author: jtpio

app/package.json

@@ -75,7 +75,7 @@
     "@jupyterlab/translation": "~4.0.0-alpha.8",
     "@jupyterlab/translation-extension": "~4.0.0-alpha.8",
     "@jupyterlab/ui-components": "~4.0.0-alpha.23",
-    "@jupyterlab/ui-components-extensions": "~4.0.0-alpha.8",
+    "@jupyterlab/ui-components-extension": "~4.0.0-alpha.8",
     "@jupyterlab/user": "~4.0.0-alpha.8",
     "@jupyterlab/user-extension": "~4.0.0-alpha.8",
     "@jupyterlab/vega5-extension": "~4.0.0-alpha.8",