Update changelogs from fern repo (#3341)

Co-authored-by: iamnamananand996 <31537362+iamnamananand996@users.noreply.github.com>

Author: fern-support

fern/products/sdks/overview/ruby/changelog/2026-01-28.mdx

@@ -1,3 +1,12 @@
+## 1.0.0-rc85
+**`(fix):`** Fix detached HEAD error in publish workflow. When triggered by a tag push, the workflow
+enters detached HEAD state, causing `rubygems/release-gem@v1` (which runs `rake release`)
+to fail when pushing to a non-existent branch. Replaced with manual build/push steps using
+`rubygems/configure-rubygems-credentials@v1.0.0` for OIDC auth, `bundle exec rake build`,
+and `gem push pkg/*.gem`. Also replaced `bundler-cache: true` with explicit `bundle install`
+for more reliable dependency installation.
+
+
 ## 1.0.0-rc84
 **`(fix):`** Fix packageName being incorrectly used for folder/module naming. The packageName from
 publish config (e.g., output.publish.rubygems.packageName) is now only used for the