release new preview version under new service folder (#46385)

* release new preview version under new service folder

* update codeowner

* fix lint

Author: amber-yujueWang

.github/CODEOWNERS

@@ -770,10 +770,10 @@
 /sdk/servicefabric/    @QingChenmsft @samedder
 
 # PRLabel: %Speech Transcription
-/sdk/cognitiveservices/azure-ai-transcription/    @amber-yujueWang @rhurey @xitzhang
+/sdk/transcription/azure-ai-transcription/    @amber-yujueWang @rhurey @xitzhang @pankopon @emilyjiji
 
 # ServiceLabel: %Speech Transcription
-# ServiceOwners: @amber-yujueWang @rhurey @xitzhang
+# ServiceOwners: @amber-yujueWang @rhurey @xitzhang @pankopon @emilyjiji
 
 # PRLabel: %Storage
 /sdk/storage/    @annatisch @jalauzon-msft @vincenttran-msft @weirongw23-msft

sdk/transcription/azure-ai-transcription/CHANGELOG.md

@@ -1,15 +1,11 @@
 # Release History
 
-## 1.0.0b4 (Unreleased)
-
-### Features Added
-
-### Breaking Changes
-
-### Bugs Fixed
+## 1.0.0b4 (2026-04-20)
 
 ### Other Changes
 
+- Moved the package to a new service category folder `transcription`.
+
 ## 1.0.0b3 (2026-02-04)
 
 ### Features Added