Update CHANGELOG with Bundler and CI updates

- Document Bundler update from 2.2.19 to 4.0.4
- Document CI workflow updates
- Document additional fixes (line endings, CI bundler version)

Author: mike927

CHANGELOG.md

@@ -7,16 +7,20 @@
 - Maintained Rails compatibility: supports Rails `>= 6.1.4.1` including Rails 8.1
 - Maintained ActiveSupport compatibility: supports ActiveSupport `>= 6.1.4.1` including Rails 8.1
 - Maintained RSpec Rails compatibility: supports RSpec Rails `>= 5.0.2` (tested with Rails 8.1)
+- Updated Bundler from 2.2.19 to 4.0.4 (latest version as of January 2026)
 - Updated RuboCop to `~> 1.65` and updated TargetRubyVersion to 3.2
 - Updated Rake to `~> 13.2`
 - Updated Diffy to `~> 3.4`
 - Updated all transitive dependencies to latest compatible versions
 - Verified compatibility with Rails 8.1.2 while maintaining support for older Rails versions
 - Added `rubygems_mfa_required` metadata for enhanced security
+- Updated GitHub Actions CI workflow to use Ruby 3.2.2 and Bundler 4.0.4
 
 ### Fixed
 - Fixed RuboCop style violations (trailing commas, empty literals, symbol proc usage)
 - Fixed module function style (changed `extend self` to `module_function`)
+- Fixed line endings in Gemfile (CRLF to LF)
+- Fixed CI workflow bundler version mismatch
 
 ## [0.1.0] - 2021-08-24