Bump the dev-patch-updates group with 3 updates

Bumps the dev-patch-updates group with 3 updates: [@react-email/preview-server](https://github.com/resend/react-email/tree/HEAD/packages/preview-server), [postcss](https://github.com/postcss/postcss) and [react-email](https://github.com/resend/react-email/tree/HEAD/packages/react-email).


Updates `@react-email/preview-server` from 5.2.8 to 5.2.9
- [Release notes](https://github.com/resend/react-email/releases)
- [Changelog](https://github.com/resend/react-email/blob/canary/packages/preview-server/CHANGELOG.md)
- [Commits](https://github.com/resend/react-email/commits/@react-email/preview-server@5.2.9/packages/preview-server)

Updates `postcss` from 8.5.6 to 8.5.8
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/postcss/postcss/compare/8.5.6...8.5.8)

Updates `react-email` from 5.2.8 to 5.2.9
- [Release notes](https://github.com/resend/react-email/releases)
- [Changelog](https://github.com/resend/react-email/blob/canary/packages/react-email/CHANGELOG.md)
- [Commits](https://github.com/resend/react-email/commits/react-email@5.2.9/packages/react-email)

---
updated-dependencies:
- dependency-name: "@react-email/preview-server"
  dependency-version: 5.2.9
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: dev-patch-updates
- dependency-name: postcss
  dependency-version: 8.5.8
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: dev-patch-updates
- dependency-name: react-email
  dependency-version: 5.2.9
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: dev-patch-updates
...

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

package.json

@@ -133,7 +133,7 @@
     "devDependencies": {
         "@dotenvx/dotenvx": "1.54.1",
         "@esbuild-plugins/tsconfig-paths": "0.1.2",
-        "@react-email/preview-server": "5.2.8",
+        "@react-email/preview-server": "5.2.9",
         "@tailwindcss/postcss": "4.2.1",
         "@tanstack/react-query-devtools": "5.91.3",
         "@types/better-sqlite3": "7.6.13",
@@ -164,9 +164,9 @@
         "esbuild-node-externals": "1.20.1",
         "eslint": "9.39.2",
         "eslint-config-next": "16.1.6",
-        "postcss": "8.5.6",
+        "postcss": "8.5.8",
         "prettier": "3.8.1",
-        "react-email": "5.2.8",
+        "react-email": "5.2.9",
         "tailwindcss": "4.2.1",
         "tsc-alias": "1.8.16",
         "tsx": "4.21.0",