Added 3.5.18 release announcement

Author: Your Name

_posts/2024-08-31-3.5.18-released.md

@@ -0,0 +1,39 @@
+---
+title: 3.5.18 Released
+layout: post
+author: Your Name
+author_email: you@example.com
+---
+
+RubyGems 3.5.18 includes enhancements and bug fixes.
+
+To update to the latest RubyGems you can run:
+
+    gem update --system
+
+To install RubyGems by hand see the [Download RubyGems][download] page.
+
+
+_## Enhancements:_
+
+* Installs bundler 2.5.18 as a default gem.
+
+_## Bug fixes:_
+
+* Fix `gem uninstall <name>:<version>` failing on shadowed default gems.
+  Pull request [#7949](https://github.com/rubygems/rubygems/pull/7949) by
+  deivid-rodriguez
+
+
+SHA256 Checksums:
+
+* rubygems-3.5.18.tgz  
+  4737b54c12f59a0ef3f5c480ec6c02d604583cf1c585f51cc09225967b4b5a4b
+* rubygems-3.5.18.zip  
+  df98cf106c90ca6ac9a3a857ee33f9486d7ef67f604b789179df1093e6c96a04
+* rubygems-update-3.5.18.gem  
+  fb0cc5c6834cc913751ea8ce19868faf03f62472d099aea629d2d3c84347008b
+
+
+[download]: https://rubygems.org/pages/download
+