Added 4.0.0.beta2 release announcement

Author: hsbt

_posts/2025-11-26-4.0.0.beta2-released.md

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+---
+title: 4.0.0.beta2 Released
+layout: post
+author: Hiroshi SHIBATA
+author_email: hsbt@ruby-lang.org
+---
+
+RubyGems 4.0.0.beta2 includes deprecations, enhancements and bug fixes and Bundler 4.0.0.beta2 includes features, performance, enhancements and bug fixes.
+
+To update to the latest RubyGems you can run:
+
+    gem update --system [--pre]
+
+To update to the latest Bundler you can run:
+
+    gem install bundler [--pre]
+    bundle update --bundler=4.0.0.beta2
+
+## RubyGems Release Notes
+
+
+_### Deprecations:_
+
+* Deprecate comparing Gem::Version objects with strings. Pull request
+  [#9085](https://github.com/ruby/rubygems/pull/9085) by tenderlove
+
+_### Enhancements:_
+
+* Undeprecate Gem::Version#<=> against strings. Pull request
+  [#9110](https://github.com/ruby/rubygems/pull/9110) by byroot
+* Installs bundler 4.0.0.beta2 as a default gem.
+
+_### Bug fixes:_
+
+* Respect `BUNDLE_VERSION` config at Gem::BundlerVersionFinder. Pull
+  request [#9106](https://github.com/ruby/rubygems/pull/9106) by hsbt
+
+
+## Bundler Release Notes
+
+
+_### Features:_
+
+  - Support bundle install --lockfile option [#9111](https://github.com/ruby/rubygems/pull/9111)
+  - Add support for lockfile in Gemfile and bundle install --no-lock [#9059](https://github.com/ruby/rubygems/pull/9059)
+
+_### Performance:_
+
+  - Run git operations in parallel to speed things up: [#9100](https://github.com/ruby/rubygems/pull/9100)
+
+_### Enhancements:_
+
+  - Fixup GH-9085 [#9108](https://github.com/ruby/rubygems/pull/9108)
+  - Add go_gem/rake_task for Go native extention gem skeleton [#9105](https://github.com/ruby/rubygems/pull/9105)
+  - Keep legacy windows platform, not removed them [#9104](https://github.com/ruby/rubygems/pull/9104)
+
+_### Bug fixes:_
+
+  - Check for file existence before deletion from cache [#9095](https://github.com/ruby/rubygems/pull/9095)
+
+
+## Manual Installation
+
+To install RubyGems by hand see the [Download RubyGems][download] page.
+
+SHA256 Checksums:
+
+* rubygems-4.0.0.beta2.tgz  
+  56363005d89de2e7d0ffb309ea966eff32e4aba80364366b0aac47cca6536748
+* rubygems-4.0.0.beta2.zip  
+  66cda8eaf12a0c20e0b44461c9d6bd33b647c03c333c0c59cd49b8ba7dce5dcf
+* rubygems-update-4.0.0.beta2.gem  
+  6aa2c4352e176b97982ffe8d85cd285730c04f980b35d093af3975ca8a89c6a7
+
+
+[download]: https://rubygems.org/pages/download
+