Bump @wordpress/env from 4.7.0 to 4.9.0

Bumps [@wordpress/env](https://github.com/WordPress/gutenberg/tree/HEAD/packages/env) from 4.7.0 to 4.9.0.
- [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/env@4.9.0/packages/env)

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

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

Author: dependabot[bot]

package-lock.json

@@ -18,7 +18,7 @@
     "node": ">=10.16.0"
   },
   "devDependencies": {
-    "@wordpress/env": "~4.7.0",
+    "@wordpress/env": "~4.9.0",
     "@wordpress/scripts": "~23.1.0",
     "@wordpress/stylelint-config": "^20.0.2"
   },