Added 3.5.18 release announcement

Author: Your Name

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

@@ -0,0 +1,33 @@
+---
+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:
+
+
+
+[download]: https://rubygems.org/pages/download
+