release v3.5.2 (#656)

```
[v3.5.2] (June 23 2023)

Fixes:
* Allow to reduce the mobile app height
  It was not able to reduce the height of the mobile app with some wrapper component
* Do not display the UnreadCount(new message notification) comp when unreadSince is null
* Improve sampling and bitrate of Voice Recording
  * sampling rate: 11025
  * bit rate: 12000
* Move scroll every time when message height changes
  It moved scroll only when the last message height changes
```

[SDKRLSD-882](https://sendbird.atlassian.net/browse/SDKRLSD-882)

Author: HoonBaek

CHANGELOG.md

@@ -1,5 +1,17 @@
 # Changelog - v3
 
+## [v3.5.2] (June 23 2023)
+
+Fixes:
+* Allow to reduce the mobile app height
+  It was not able to reduce the height of the mobile app with some wrapper components
+* Do not display the UnreadCount(new message notification) comp when unreadSince is null
+* Improve sampling and bitrate of Voice Recording
+  * sampling rate: 11025
+  * bit rate: 12000
+* Move scroll every time when message height changes
+  It moved scroll only when the last message height changes
+
 ## [v3.5.1] (June 15 2023)
 
 Fixes: