Update roots/wordpress requirement from ^6.6 to ^6.7

Updates the requirements on [roots/wordpress](https://github.com/roots/wordpress) to permit the latest version.
- [Release notes](https://github.com/roots/wordpress/releases)
- [Commits](roots/wordpress@6.6...6.7)

---
updated-dependencies:
- dependency-name: roots/wordpress
  dependency-type: direct:development
...

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

composer.json

@@ -46,7 +46,7 @@
 		"phpstan/phpstan-phpunit": "^1.4",
 		"phpstan/phpstan-strict-rules": "^1.6",
 		"phpunit/phpunit": "^9.6",
-		"roots/wordpress": "^6.6",
+		"roots/wordpress": "^6.7",
 		"symfony/var-dumper": "^5.4",
 		"syntatis/coding-standard": "^1.5",
 		"szepeviktor/phpstan-wordpress": "^1.3",