chore(deps): bump ws from 8.18.3 to 8.21.0 in /frontend

Bumps [ws](https://github.com/websockets/ws) from 8.18.3 to 8.21.0.
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@8.18.3...8.21.0)

---
updated-dependencies:
- dependency-name: ws
  dependency-version: 8.21.0
  dependency-type: indirect
...

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

Author: dependabot[bot]

frontend/yarn.lock

@@ -5792,9 +5792,9 @@ wrap-ansi@^7.0.0:
     strip-ansi "^6.0.0"
 
 ws@^8.18.0, ws@^8.18.3:
-  version "8.18.3"
-  resolved "https://registry.yarnpkg.com/ws/-/ws-8.18.3.tgz#b56b88abffde62791c639170400c93dcb0c95472"
-  integrity sha512-PEIGCY5tSlUt50cqyMXfCzX+oOPqN0vuGqWzbcJ2xvnkzkq46oOpz7dQaTDBdfICb4N14+GARUDw2XV2N4tvzg==
+  version "8.21.0"
+  resolved "https://registry.yarnpkg.com/ws/-/ws-8.21.0.tgz#012e413fc07429945121b0c153158c4343086951"
+  integrity sha512-Vsp28b7DRcimFQvrqu2Wek3z1iYxDCWqHYB8Qsnk/S4RfaCQzPGPyBNuVjJV3cd6UiKtUtp6sNM77gWvzcCH+g==
 
 wsl-utils@^0.1.0:
   version "0.1.0"