use vue-richtext 2.1.0-beta.4

Signed-off-by: Julien Veyssier <julien-nc@posteo.net>

Author: julien-nc

package-lock.json

@@ -47,7 +47,7 @@
     "@nextcloud/moment": "^1.2.1",
     "@nextcloud/router": "^2.0.1",
     "@nextcloud/vue": "^7.5.0",
-    "@nextcloud/vue-richtext": "^2.1.0-beta.3",
+    "@nextcloud/vue-richtext": "^2.1.0-beta.4",
     "@quartzy/markdown-it-mentions": "^0.2.0",
     "@tiptap/core": "^2.0.0-beta.209",
     "@tiptap/extension-blockquote": "^2.0.0-beta.209",