Bump the postcss group with 3 updates

Bumps the postcss group with 3 updates: [autoprefixer](https://github.com/postcss/autoprefixer), [cssnano](https://github.com/cssnano/cssnano) and [cssnano-preset-default](https://github.com/cssnano/cssnano).


Updates `autoprefixer` from 10.4.18 to 10.4.19
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/main/CHANGELOG.md)
- [Commits](postcss/autoprefixer@10.4.18...10.4.19)

Updates `cssnano` from 6.1.0 to 6.1.1
- [Release notes](https://github.com/cssnano/cssnano/releases)
- [Commits](https://github.com/cssnano/cssnano/compare/cssnano@6.1.0...cssnano@6.1.1)

Updates `cssnano-preset-default` from 6.1.0 to 6.1.1
- [Release notes](https://github.com/cssnano/cssnano/releases)
- [Commits](https://github.com/cssnano/cssnano/compare/cssnano-preset-default@6.1.0...cssnano-preset-default@6.1.1)

---
updated-dependencies:
- dependency-name: autoprefixer
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: postcss
- dependency-name: cssnano
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: postcss
- dependency-name: cssnano-preset-default
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: postcss
...

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

docs/examples/webpack/package.json

@@ -14,7 +14,7 @@
   "devDependencies": {
     "@babel/core": "^7.24.3",
     "@babel/preset-env": "^7.24.3",
-    "autoprefixer": "^10.4.18",
+    "autoprefixer": "^10.4.19",
     "babel-loader": "^9.1.3",
     "copy-webpack-plugin": "^12.0.2",
     "css-loader": "^6.10.0",

packages/govuk-frontend-review/package.json

@@ -49,9 +49,9 @@
     "@rollup/plugin-commonjs": "^25.0.7",
     "@rollup/plugin-node-resolve": "^15.2.3",
     "@rollup/plugin-terser": "^0.4.4",
-    "autoprefixer": "^10.4.18",
+    "autoprefixer": "^10.4.19",
     "browser-sync": "^3.0.2",
-    "cssnano": "^6.1.0",
+    "cssnano": "^6.1.1",
     "cssnano-preset-default": "^6.1.0",
     "gulp": "^4.0.2",
     "gulp-cli": "^2.3.0",

packages/govuk-frontend/package.json

@@ -70,8 +70,8 @@
     "@rollup/plugin-babel": "^6.0.4",
     "@rollup/plugin-replace": "^5.0.5",
     "@rollup/plugin-terser": "^0.4.4",
-    "autoprefixer": "^10.4.18",
-    "cssnano": "^6.1.0",
+    "autoprefixer": "^10.4.19",
+    "cssnano": "^6.1.1",
     "cssnano-preset-default": "^6.0.1",
     "govuk-prototype-kit": "^13.16.1",
     "gulp": "^4.0.2",