docs: update changelog for integrations/llama_stack (#2172)

* Update changelog for integrations/llama_stack

* Update CHANGELOG.md

---------

Co-authored-by: sjrl <10526848+sjrl@users.noreply.github.com>

Author: HaystackBot

integrations/llama_stack/CHANGELOG.md

@@ -1,5 +1,12 @@
 # Changelog
 
+## [integrations/llama_stack-v1.1.0] - 2025-08-08
+
+
+### 🌀 Miscellaneous
+
+- Chore: Unpin Llama Stack version (#2171)
+
 ## [integrations/llama_stack-v1.0.1] - 2025-08-08
 
 ### 🐛 Bug Fixes