Upgrade bundler to latest

stefannibrasil · stefannibrasil · commit 2233bcc0f9e2 · 2026-02-18T17:09:46.000-07:00
This also resolves some local tests warnings.
diff --git a/Gemfile.lock b/Gemfile.lock
@@ -801,4 +801,4 @@ RUBY VERSION
    ruby 3.3.10p183
 
 BUNDLED WITH
-   2.6.6
+   4.0.6
