docs: update changelog for integrations/togetherai (#2538)

* Update changelog for integrations/togetherai

* Update CHANGELOG.md

---------

Co-authored-by: Amnah199 <[email protected]>
Co-authored-by: Amna Mubashar <[email protected]>

Author: HaystackBot

integrations/togetherai/CHANGELOG.md

@@ -1,5 +1,14 @@
 # Changelog
 
+## [integrations/togetherai-v2.1.0] - 2025-11-19
+
+### 🚀 Features
+- Support for structured outputs
+
+### 🌀 Miscellaneous
+
+- Enhancement: Adopt PEP 585 type hinting (part 5) (#2528)
+
 ## [integrations/togetherai-v2.0.0] - 2025-10-23
 
 ### 🌀 Miscellaneous