fix: bundler version

effx13 · effx13 · commit f42b33def9a2 · 2025-10-17T17:38:50.000+09:00
diff --git a/example/Gemfile.lock b/example/Gemfile.lock
@@ -122,4 +122,4 @@ RUBY VERSION
    ruby 2.7.6p219
 
 BUNDLED WITH
-   2.1.4
+   2.7.2
