Update changelog for integrations/togetherai (#2456)

Co-authored-by: anakin87 <44616784+anakin87@users.noreply.github.com>

Author: HaystackBot

integrations/togetherai/CHANGELOG.md

@@ -1,8 +1,9 @@
 # Changelog
 
-## [integrations/togetherai-v1.0.0] - 2025-10-14
+## [integrations/togetherai-v2.0.0] - 2025-10-23
 
-### 🚀 Features
+### 🌀 Miscellaneous
 
-- Add Together AI integration (#2268)
+- Chore!: rename `together_ai` to `togetherai` (#2451)
 
+<!-- generated by git-cliff -->