Added 4.0.6 release announcement

Author: hsbt

_posts/2026-02-05-4.0.6-released.md

@@ -0,0 +1,58 @@
+---
+title: 4.0.6 Released
+layout: post
+author: Hiroshi SHIBATA
+author_email: hsbt@ruby-lang.org
+---
+
+RubyGems 4.0.6 includes enhancements and Bundler 4.0.6 includes bug fixes and documentation.
+
+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=4.0.6
+
+## RubyGems Release Notes
+
+
+### Enhancements:
+
+* Update vendored resolv to 0.7.0. Pull request
+  [#9298](https://github.com/ruby/rubygems/pull/9298) by hsbt
+* Installs bundler 4.0.6 as a default gem.
+
+
+## Bundler Release Notes
+
+
+### Bug fixes:
+
+  - Fix gzip cache corruption when recovering from HTTP 416 responses [#9272](https://github.com/ruby/rubygems/pull/9272)
+  - Fallback git/path sources to default source [#9301](https://github.com/ruby/rubygems/pull/9301)
+  - Ensure revision is always re-resolved in `git_proxy.rb` [#9294](https://github.com/ruby/rubygems/pull/9294)
+
+### Documentation:
+
+  - Clarify local gem override docs to require git-sourced gems [#9305](https://github.com/ruby/rubygems/pull/9305)
+
+
+## Manual Installation
+
+To install RubyGems by hand see the [Download RubyGems][download] page.
+
+SHA256 Checksums:
+
+* rubygems-4.0.6.tgz  
+  98049c08fb8a94a12cc10c43ef4997faec76c4c6f328733a938f1ca6aa2c811e
+* rubygems-4.0.6.zip  
+  5dc4e49b1399a99465bf1ea4c188d920fbe28e0b7193a3dc44891216e1b1d5ff
+* rubygems-update-4.0.6.gem  
+  bbd93b2e1410ebc41d22e07c1b3346d03b633b09b12421bf0b776ad5c9a3acc4
+
+
+[download]: https://rubygems.org/pages/download
+