fix: delta insert assert (#5083)

frontend/appflowy_flutter/pubspec.lock

@@ -53,8 +53,8 @@ packages:
     dependency: "direct main"
     description:
       path: "."
-      ref: b927ec0
-      resolved-ref: b927ec0685c870c731c5b6d9688a031d0cd31e76
+      ref: a9c77a9
+      resolved-ref: a9c77a918b05c02f134128813b1c04a5b6856ae4
       url: "https://github.com/AppFlowy-IO/appflowy-editor.git"
     source: git
     version: "2.3.3"

frontend/appflowy_flutter/pubspec.yaml

@@ -169,7 +169,7 @@ dependency_overrides:
   appflowy_editor:
     git:
       url: https://github.com/AppFlowy-IO/appflowy-editor.git
-      ref: "b927ec0"
+      ref: "a9c77a9"
 
   sheet:
     git: