docs: update changelog for integrations/azure_ai_search (#1895)

* Update changelog for integrations/azure_ai_search

* Update CHANGELOG.md

* Update CHANGELOG.md

---------

Co-authored-by: Amnah199 <13835656+Amnah199@users.noreply.github.com>
Co-authored-by: Amna Mubashar <amnahkhan.ak@gmail.com>

Author: HaystackBot

integrations/azure_ai_search/CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## [integrations/azure_ai_search-v2.1.0] - 2025-06-04
+
+### 🚀 Features
+
+- Feat: Allow full metadata field customization.`SearchField` can now be passed in `metadata_fields`. (#1893)
+
 ## [integrations/azure_ai_search-v2.0.2] - 2025-05-14
 
 
@@ -20,6 +26,7 @@
 
 - [**breaking**] The environment variables for AzureAIDocumentStore have been renamed for clarity. (#1597)
 
+
 ## [integrations/azure_ai_search-v1.0.0] - 2025-03-11