Fix Ruby version mismatch for CI

Updated Ruby version from 3.4.3 to 3.4.6 to match CI environment
expectations. This fixes the bundle install failure in GitHub Actions.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: justin808

Gemfile

@@ -3,7 +3,7 @@
 source "https://rubygems.org"
 git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
-ruby "3.4.3"
+ruby "3.4.6"
 
 gem "react_on_rails", "16.1.1"
 gem "shakapacker", github: "shakacode/shakapacker", branch: "justin808/early-hints"

Gemfile.lock

@@ -511,7 +511,7 @@ DEPENDENCIES
   web-console
 
 RUBY VERSION
-   ruby 3.4.3p32
+   ruby 3.4.6p54
 
 BUNDLED WITH
    2.4.17