Bump ws from 6.2.1 to 6.2.2 in /frontend

Bumps [ws](https://github.com/websockets/ws) from 6.2.1 to 6.2.2.
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](https://github.com/websockets/ws/compare/6.2.1...6.2.2)

---
updated-dependencies:
- dependency-name: ws
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

frontend/yarn.lock

@@ -2208,8 +2208,8 @@ async-foreach@^0.1.3:
 
 async-limiter@~1.0.0:
   version "1.0.1"
-  resolved "https://registry.npm.taobao.org/async-limiter/download/async-limiter-1.0.1.tgz#dd379e94f0db8310b08291f9d64c3209766617fd"
-  integrity sha1-3TeelPDbgxCwgpH51kwyCXZmF/0=
+  resolved "https://registry.yarnpkg.com/async-limiter/-/async-limiter-1.0.1.tgz#dd379e94f0db8310b08291f9d64c3209766617fd"
+  integrity sha512-csOlWGAcRFJaI6m+F2WKdnMKr4HhdhFVBk0H/QbJFMCr+uO2kwohwXQPxw/9OCxp05r5ghVBFSyioixx3gfkNQ==
 
 async-validator@^3.0.3:
   version "3.5.1"
@@ -9802,9 +9802,9 @@ write@1.0.3:
     mkdirp "^0.5.1"
 
 ws@^6.0.0, ws@^6.2.1:
-  version "6.2.1"
-  resolved "https://registry.npm.taobao.org/ws/download/ws-6.2.1.tgz?cache=0&sync_timestamp=1615063746103&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fws%2Fdownload%2Fws-6.2.1.tgz#442fdf0a47ed64f59b6a5d8ff130f4748ed524fb"
-  integrity sha1-RC/fCkftZPWbal2P8TD0dI7VJPs=
+  version "6.2.2"
+  resolved "https://registry.yarnpkg.com/ws/-/ws-6.2.2.tgz#dd5cdbd57a9979916097652d78f1cc5faea0c32e"
+  integrity sha512-zmhltoSR8u1cnDsD43TX59mzoMZsLKqUweyYBAIvTngR3shc0W6aOZylZmq/7hqyVxPdi+5Ud2QInblgyE72fw==
   dependencies:
     async-limiter "~1.0.0"