Update changelogs from fern repo (#486)

Co-authored-by: jsklan <[email protected]>

Author: fern-support

fern/products/sdks/overview/ruby/changelog/2025-08-13.mdx

@@ -1,3 +1,6 @@
+## 1.0.0-rc1
+**`(feat):`** Fix circular type references within the Ruby SDK generator.
+
 ## 1.0.0-rc0
 **`(feat):`** Introduce a revamped Ruby SDK generator with several improvements  to be detailed in a larger post.