docs: update changelog and version for v1.13.0a3

docs/en/changelog.mdx

@@ -4,6 +4,38 @@ description: "Product updates, improvements, and bug fixes for CrewAI"
 icon: "clock"
 mode: "wide"
 ---
+<Update label="Apr 01, 2026">
+  ## v1.13.0a3
+
+  [View release on GitHub](https://github.com/crewAIInc/crewAI/releases/tag/1.13.0a3)
+
+  ## What's Changed
+
+  ### Features
+  - Emit token usage data in LLMCallCompletedEvent
+  - Extract and publish tool metadata to AMP
+
+  ### Bug Fixes
+  - Handle GPT-5.x models not supporting the `stop` API parameter
+
+  ### Documentation
+  - Fix inaccuracies in agent-capabilities across all languages
+  - Add Agent Capabilities overview and improve Skills documentation
+  - Add comprehensive SSO configuration guide
+  - Update changelog and version for v1.13.0rc1
+
+  ### Refactoring
+  - Convert Flow to Pydantic BaseModel
+  - Convert LLM classes to Pydantic BaseModel
+  - Replace InstanceOf[T] with plain type annotations
+  - Remove unused methods
+
+  ## Contributors
+
+  @dependabot[bot], @greysonlalonde, @iris-clawd, @lorenzejay, @lucasgomide, @thiagomoretto
+
+</Update>
+
 <Update label="Mar 27, 2026">
   ## v1.13.0rc1