Bump @wordpress/eslint-plugin from 21.5.0 to 21.6.0

Bumps [@wordpress/eslint-plugin](https://github.com/WordPress/gutenberg/tree/HEAD/packages/eslint-plugin) from 21.5.0 to 21.6.0.
- [Release notes](https://github.com/WordPress/gutenberg/releases)
- [Changelog](https://github.com/WordPress/gutenberg/blob/trunk/packages/eslint-plugin/CHANGELOG.md)
- [Commits](https://github.com/WordPress/gutenberg/commits/@wordpress/[email protected]/packages/eslint-plugin)

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

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

package.json

@@ -60,7 +60,7 @@
     "@typescript-eslint/parser": "^7.18.0",
     "@wordpress/browserslist-config": "^6.12.0",
     "@wordpress/element": "^6.12.0",
-    "@wordpress/eslint-plugin": "^21.5.0",
+    "@wordpress/eslint-plugin": "^21.6.0",
     "@wordpress/stylelint-config": "^23.5.0",
     "eslint": "^8.57.1",
     "eslint-plugin-compat": "^6.0.1",