Jimin/update spec link to main branch (#45810)

* add azure-json dependency for consumers

* update spec to main

* exclude CreateChatThreadOptions

Author: jiminwen-msft

sdk/communication/azure-communication-chat/swagger/README.md

@@ -38,14 +38,14 @@ To update generated files for chat service, run the following command
 tag: package-chat-2025-03-15
 use: '@autorest/java@4.1.33'
 require:
-    - https://raw.githubusercontent.com/Azure/azure-rest-api-specs/b97334ac101d4a5e6556e4d67d1bcdd46fc12139/specification/communication/data-plane/Chat/readme.md
+    - https://raw.githubusercontent.com/Azure/azure-rest-api-specs/e5f9d3b1d33ee4e98eef7ec302966f5b0b6efeeb/specification/communication/data-plane/Chat/readme.md
 java: true
 title: AzureCommunicationChatService
 output-folder: ..\
 license-header: MICROSOFT_MIT_SMALL
 namespace: com.azure.communication.chat
 generate-client-as-impl: true
-custom-types: ChatMessagePriority,ChatThreadItem,PostReadReceiptOptions,SendChatMessageOptions,UpdateChatMessageOptions,UpdateChatThreadOptions,ChatMessageType,SendChatMessageResult,TypingNotificationOptions
+custom-types: ChatMessagePriority,ChatThreadItem,PostReadReceiptOptions,SendChatMessageOptions,UpdateChatMessageOptions,UpdateChatThreadOptions,ChatMessageType,SendChatMessageResult,TypingNotificationOptions,CreateChatThreadOptions
 custom-types-subpackage: models
 models-subpackage: implementation.models
 generate-client-interfaces: false