Bump webpack-dev-middleware in /samples/react-appinsights-dashboard

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>

samples/react-appinsights-dashboard/pnpm-lock.yaml

@@ -15287,8 +15287,8 @@ packages:
     resolution: {integrity: sha512-YQ+BmxuTgd6UXZW3+ICGfyqRyHXVlD5GtQr5+qjiNW7bF0cqrzX500HVXPBOvgXb5YnzDd+h0zqyv61KUD7+Sg==}
     dev: true
 
-  /webpack-dev-middleware@5.3.3(webpack@4.44.2):
-    resolution: {integrity: sha512-hj5CYrY0bZLB+eTO+x/j67Pkrquiy7kWepMHmUMoPsmcUaeEnQJqFzHJOyxgWlq746/wUuA64p9ta34Kyb01pA==}
+  /webpack-dev-middleware@5.3.4(webpack@4.44.2):
+    resolution: {integrity: sha512-BVdTqhhs+0IfoeAf7EoH5WE+exCmqGerHfDM0IL096Px60Tq2Mn9MAbnaGUe6HiMa41KMCYF19gyzZmBcq/o4Q==}
     engines: {node: '>= 12.13.0'}
     peerDependencies:
       webpack: ^4.0.0 || ^5.0.0
@@ -15340,7 +15340,7 @@ packages:
       sockjs: 0.3.24
       spdy: 4.0.2
       webpack: 4.44.2
-      webpack-dev-middleware: 5.3.3(webpack@4.44.2)
+      webpack-dev-middleware: 5.3.4(webpack@4.44.2)
       ws: 8.12.0
     transitivePeerDependencies:
       - bufferutil