chore(deps-dev): Bump @wordpress/env from 8.12.0 to 9.0.0

Bumps [@wordpress/env](https://github.com/WordPress/gutenberg/tree/HEAD/packages/env) from 8.12.0 to 9.0.0.
- [Release notes](https://github.com/WordPress/gutenberg/releases)
- [Changelog](https://github.com/WordPress/gutenberg/blob/trunk/packages/env/CHANGELOG.md)
- [Commits](https://github.com/WordPress/gutenberg/commits/@wordpress/[email protected]/packages/env)

---
updated-dependencies:
- dependency-name: "@wordpress/env"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -23,7 +23,7 @@
   "author": "Automattic",
   "devDependencies": {
     "@babel/plugin-syntax-decorators": "^7.19.0",
-    "@wordpress/env": "^8.0.0",
+    "@wordpress/env": "^9.0.0",
     "10up-toolkit": "^5.0.0",
     "classnames": "^2.3.1",
     "cypress": "^9.5.0",