chore: fix bundler ordering in file

lib/manager/index.js

 const managerList = [
   'bazel',
   'buildkite',
+  'bundler',
   'cargo',
   'circleci',
   'composer',
@@ -10,7 +11,6 @@ const managerList = [
   'gomod',
   'kubernetes',
   'meteor',
-  'bundler',
   'npm',
   'nvm',
   'pip_requirements',
@@ -30,10 +30,10 @@ const languageList = [
   'docker',
   'golang',
   'js',
-  'ruby',
   'node',
   'php',
   'python',
+  'ruby',
   'rust',
 ];