chore(bundler-webpack): updates webpack-dev-middleware dependency (#6446

)

## Description

`pnpm audit` of `bundler-webpack` showed a high severity security issue
with the `webpack-dev-middleware` package

Updated package to latest to resolve.

- [x] I have read and understand the
[CONTRIBUTING.md](https://github.com/payloadcms/payload/blob/main/CONTRIBUTING.md)
document in this repository.

## Type of change

- [x] Bug fix (non-breaking change which fixes an issue)

## Checklist:

- [x] Existing test suite passes locally with my changes

packages/bundler-webpack/package.json

@@ -47,7 +47,7 @@
     "webpack": "^5.78.0",
     "webpack-bundle-analyzer": "^4.8.0",
     "webpack-cli": "^4.10.0",
-    "webpack-dev-middleware": "6.0.1",
+    "webpack-dev-middleware": "6.1.2",
     "webpack-hot-middleware": "^2.25.3"
   },
   "devDependencies": {