fix(manager/woodpecker): fix fileMatch (#19661)

lib/modules/manager/woodpecker/index.ts

@@ -7,7 +7,7 @@ export const language: ProgrammingLanguage = 'docker';
 export { extractPackageFile };
 
 export const defaultConfig = {
-  fileMatch: ['(^|\\/)\\.woodpecker[^/]*\\.ya?ml$'],
+  fileMatch: ['^\\.woodpecker(?:\\/[^/]+)?\\.ya?ml$'],
 };
 
 export const supportedDatasources = [DockerDatasource.id];