Ruby 3.3 upgrade

* Bump Bundler version: avoids ruby/rubygems#8217
* No longer automatically bump Bundler version (we can add this back after we upgrade to Ruby 3.4)

Author: sethboyles

.github/workflows/bump_bundler_version.yml

@@ -1 +1 @@
-3.2.10
+3.3.10

.ruby-version

@@ -705,4 +705,4 @@ DEPENDENCIES
   webrick (~> 1.9.2)
 
 BUNDLED WITH
-   2.4.19
+   2.6.9