Bump webpack-dev-middleware from 5.3.3 to 5.3.4 in /microsite

Bumps [webpack-dev-middleware](https://github.com/webpack/webpack-dev-middleware) from 5.3.3 to 5.3.4.
- [Release notes](https://github.com/webpack/webpack-dev-middleware/releases)
- [Changelog](https://github.com/webpack/webpack-dev-middleware/blob/v5.3.4/CHANGELOG.md)
- [Commits](https://github.com/webpack/webpack-dev-middleware/compare/v5.3.3...v5.3.4)

---
updated-dependencies:
- dependency-name: webpack-dev-middleware
  dependency-type: indirect
...

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

microsite/yarn.lock

@@ -11652,8 +11652,8 @@ __metadata:
   linkType: hard
 
 "webpack-dev-middleware@npm:^5.3.1":
-  version: 5.3.3
-  resolution: "webpack-dev-middleware@npm:5.3.3"
+  version: 5.3.4
+  resolution: "webpack-dev-middleware@npm:5.3.4"
   dependencies:
     colorette: ^2.0.10
     memfs: ^3.4.3
@@ -11662,7 +11662,7 @@ __metadata:
     schema-utils: ^4.0.0
   peerDependencies:
     webpack: ^4.0.0 || ^5.0.0
-  checksum: dd332cc6da61222c43d25e5a2155e23147b777ff32fdf1f1a0a8777020c072fbcef7756360ce2a13939c3f534c06b4992a4d659318c4a7fe2c0530b52a8a6621
+  checksum: 90cf3e27d0714c1a745454a1794f491b7076434939340605b9ee8718ba2b85385b120939754e9fdbd6569811e749dee53eec319e0d600e70e0b0baffd8e3fb13
   languageName: node
   linkType: hard