fix(homebrew): allow subdirectories for Homebrew Formulas (#42542)

* fix(homebrew): allow subdirectories for Homebrew Formulas

* fix(homebrew): only allow up to 1 subdirectory

* fix(homebrew): double escape w (word character)

Co-authored-by: Michael Kriese <michael.kriese@gmx.de>

---------

Co-authored-by: Michael Kriese <michael.kriese@gmx.de>

Author: ReenigneArcher

lib/modules/manager/homebrew/index.ts

@@ -9,7 +9,7 @@ export const url = 'https://brew.sh';
 
 export const defaultConfig = {
   commitMessageTopic: 'Homebrew Formula {{depName}}',
-  managerFilePatterns: ['/^Formula/[^/]+[.]rb$/'],
+  managerFilePatterns: ['/^Formula/\\w*/?[^/]+[.]rb$/'],
 };
 
 export const supportedDatasources = [