build(deps): bump webpack-dev-server and @rspack/cli

Bumps [webpack-dev-server](https://github.com/webpack/webpack-dev-server) to 5.2.6 and updates ancestor dependency [@rspack/cli](https://github.com/web-infra-dev/rspack/tree/HEAD/packages/rspack-cli). These dependencies need to be updated together.


Updates `webpack-dev-server` from 5.2.2 to 5.2.6
- [Release notes](https://github.com/webpack/webpack-dev-server/releases)
- [Changelog](https://github.com/webpack/webpack-dev-server/blob/v5.2.6/CHANGELOG.md)
- [Commits](webpack/webpack-dev-server@v5.2.2...v5.2.6)

Updates `@rspack/cli` from 1.7.12 to 2.1.5
- [Release notes](https://github.com/web-infra-dev/rspack/releases)
- [Commits](https://github.com/web-infra-dev/rspack/commits/v2.1.5/packages/rspack-cli)

---
updated-dependencies:
- dependency-name: webpack-dev-server
  dependency-version: 5.2.6
  dependency-type: indirect
- dependency-name: "@rspack/cli"
  dependency-version: 2.1.5
  dependency-type: direct:development
...

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

Author: dependabot[bot]

package-lock.json

@@ -48,7 +48,7 @@
     "@nx/jest": "^22.4.2",
     "@nx/js": "^22.4.2",
     "@rspack/core": "^1.7.12",
-    "@rspack/cli": "^1.7.12",
+    "@rspack/cli": "^2.1.5",
     "@rspack/dev-server": "^1.2.1",
     "@testing-library/dom": "^10.4.1",
     "@testing-library/jest-dom": "^6.9.1",