Fix: Resolve typo in /list route function (#8769)

### What problem does this PR solve?

Fixes a function name typo for the `/list` route in
`api/apps/conversation_app.py`.

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

api/apps/conversation_app.py

 
 @manager.route("/list", methods=["GET"])  # noqa: F821
 @login_required
-def list_convsersation():
+def list_conversation():
     dialog_id = request.args["dialog_id"]
     try:
         if not DialogService.query(tenant_id=current_user.id, id=dialog_id):