Prepare linting-extensions for release (#48449)

Author: alzimmermsft

sdk/tools/linting-extensions/CHANGELOG.md

@@ -1,14 +1,10 @@
 # Release History
 
-## 1.0.0-beta.2 (Unreleased)
+## 1.0.0-beta.2 (2026-03-17)
 
 ### Features Added
 
-### Breaking Changes
-
-### Bugs Fixed
-
-### Other Changes
+- Added `SerializableMethodsCheck` to validate that `JsonSerializable` and `XmlSerializable` implementations have the required methods for serialization and deserialization.
 
 ## 1.0.0-beta.1 (2025-07-22)