Bump the twentytwentyfive-css group across 1 directory with 2 updates

Bumps the twentytwentyfive-css group with 2 updates in the /src/wp-content/themes/twentytwentyfive directory: [@wordpress/browserslist-config](https://github.com/WordPress/gutenberg/tree/HEAD/packages/browserslist-config) and [postcss](https://github.com/postcss/postcss).


Updates `@wordpress/browserslist-config` from 6.34.0 to 6.46.0
- [Release notes](https://github.com/WordPress/gutenberg/releases)
- [Changelog](https://github.com/WordPress/gutenberg/blob/trunk/packages/browserslist-config/CHANGELOG.md)
- [Commits](https://github.com/WordPress/gutenberg/commits/@wordpress/browserslist-config@6.46.0/packages/browserslist-config)

Updates `postcss` from 8.5.6 to 8.5.14
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.5.6...8.5.14)

---
updated-dependencies:
- dependency-name: "@wordpress/browserslist-config"
  dependency-version: 6.46.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: twentytwentyfive-css
- dependency-name: postcss
  dependency-version: 8.5.14
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: twentytwentyfive-css
...

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

Author: dependabot[bot]

src/wp-content/themes/twentytwentyfive/package-lock.json

@@ -17,8 +17,8 @@
 		"npm": ">=10.2.3"
 	},
 	"devDependencies": {
-		"@wordpress/browserslist-config": "^6.34.0",
-		"postcss": "^8.5.6",
+		"@wordpress/browserslist-config": "^6.46.0",
+		"postcss": "^8.5.14",
 		"postcss-cli": "^11.0.1",
 		"cssnano": "^7.1.2"
 	},