Add more verbose error messages in embed chat (#2306)

* publish embed updates

* server sided error messages

* publish embed chat widget

* sync submodule

* unset change

* update embed to merged changes for error

---------

Co-authored-by: timothycarambat <rambat1010@gmail.com>

embed @ 6bd51d25

-Subproject commit 22a0848d58e3a758d85d93d9204a72a65854ea94
+Subproject commit 6bd51d251ff1b204d7d88cdda0061df00676386e

server/utils/middleware/embedMiddleware.js

@@ -122,7 +122,8 @@ async function canRespond(request, response, next) {
           textResponse: null,
           sources: [],
           close: true,
-          error:
+          error: "Rate limit exceeded",
+          errorMsg:
             "The quota for this chat has been reached. Try again later or contact the site owner.",
         });
         return;