build(deps-dev): bump webpack-dev-server from 4.2.0 to 4.2.1 in /web/app (#6882)

Bumps [webpack-dev-server](https://github.com/webpack/webpack-dev-server) from 4.2.0 to 4.2.1.
- [Release notes](https://github.com/webpack/webpack-dev-server/releases)
- [Changelog](https://github.com/webpack/webpack-dev-server/blob/master/CHANGELOG.md)
- [Commits](webpack/webpack-dev-server@v4.2.0...v4.2.1)

---
updated-dependencies:
- dependency-name: webpack-dev-server
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

web/app/package.json

@@ -81,7 +81,7 @@
     "webpack": "^5.52.1",
     "webpack-bundle-analyzer": "4.4.2",
     "webpack-cli": "4.8.0",
-    "webpack-dev-server": "4.2.0"
+    "webpack-dev-server": "4.2.1"
   },
   "resolutions": {
     "@lingui/**/**/minimist": ">=1.2.5",

web/app/yarn.lock

@@ -9521,10 +9521,10 @@ webpack-dev-middleware@^5.1.0:
     range-parser "^1.2.1"
     schema-utils "^3.1.0"
 
-[email protected].0:
-  version "4.2.0"
-  resolved "https://registry.yarnpkg.com/webpack-dev-server/-/webpack-dev-server-4.2.0.tgz#f669117e97f0acbee447a5b2eb70060b03f39dcb"
-  integrity sha512-iBaDkHBLfW3cEITeJWNkjZBrm+b5A3YLg8XVdNOdjUNABdXJwcsJv4dzKSnVf1q4Ch489+6epWVW6OcOyVfG7w==
+[email protected].1:
+  version "4.2.1"
+  resolved "https://registry.yarnpkg.com/webpack-dev-server/-/webpack-dev-server-4.2.1.tgz#12e912b3cad8ddd5222a4ba2c41c6fc69d2545fb"
+  integrity sha512-SQrIyQDZsTaF84p/WMAXNRKxjTeIaewhDIiHYZ423ENhNAsQWyubvqPTn0IoLMGkbhWyWv8/GYnCjItt0ZNC5w==
   dependencies:
     ansi-html-community "^0.0.8"
     bonjour "^3.5.0"