Update release date (#833)

CHILIU-MSFT · web-flow · commit 0317a362a23f · 2021-08-05T12:07:16.000-07:00
diff --git a/sdk/communication/azure-communication-chat/CHANGELOG.md b/sdk/communication/azure-communication-chat/CHANGELOG.md
@@ -1,5 +1,5 @@
 # Release History
-## 1.1.0-beta.1 (Unreleased)
+## 1.1.0-beta.1 (2021-08-10)
 - Added support for metadata in messages.
 - Added options class `TypingNotificationOptions` for setting `SenderDisplayName` of the notification sender.
 - Added `SenderDisplayName` to `TypingIndicatorReceivedEvent`.
