Prepare core b5 release (#47097)

* Prepare core b5 release

* Refine b5 changelog key migration wording

* Update b5 release date to 2026-05-25

Author: Hameedkunkanoor

sdk/agentserver/azure-ai-agentserver-core/CHANGELOG.md

@@ -1,5 +1,11 @@
 # Release History
 
+## 2.0.0b5 (2026-05-25)
+
+### Bugs Fixed
+
+- Fixed the blueprint telemetry attribute key name from `gen_ai.agent.blueprint.id` to `microsoft.a365.agent.blueprint.id` to align with A365 schema and cross-SDK behavior.
+
 ## 2.0.0b4 (2026-05-21)
 
 ### Features Added

sdk/agentserver/azure-ai-agentserver-core/azure/ai/agentserver/core/_version.py

@@ -2,4 +2,4 @@
 # Copyright (c) Microsoft Corporation. All rights reserved.
 # ---------------------------------------------------------
 
-VERSION = "2.0.0b4"
+VERSION = "2.0.0b5"