release v3.4.6 (#502)

[v3.4.6] (Apr 21 2023)

Fixes:
* Use markAsReadScheduler in MessageList.
* Apply common scroll hook to GroupChannel MessageList.
* Prevent whole page from scrolling when <GroupChannel /> scrolls. This
issue occurs when customer implements an <GroupChannel /> in a web page
with scroll.
  * This is a same fix that we fixed OpenChannel in `v3.4.4`.
* Unify send btn display condition
* Issue: We could send the empty message which is consisted of only
white spaces. Also, a sent message which contains white spaces at the
beginning of it is shown like it's trimmed.
* Solution: Two things have been changed on displayed. message & message
input each.
    * New line, spaces only text do not show sending button
    * No trim before sending
* Use dynamic import to lazy load the audio converting processor(lamejs)
by isVoiceMessageEnabled props

[SDKRLSD-783](https://sendbird.atlassian.net/browse/SDKRLSD-783)

Author: HoonBaek

CHANGELOG.md

@@ -1,5 +1,21 @@
 # Changelog - v3
 
+## [v3.4.6] (Apr 21 2023)
+
+Fixes:
+* Use markAsReadScheduler in MessageList:
+  * `markAsReadScheduler` method throttles `markAsRead` calls.
+  * Reduces cmd no ack error.
+* Apply common scroll hook to GroupChannel MessageList:
+  * Prevent whole page from scrolling when <GroupChannel /> scrolls. This issue occurs when customer implements an <GroupChannel /> in a web page with scroll.
+  * This is a same fix that we fixed OpenChannel in `v3.4.4`.
+* To unify message sending policies with ios & android:
+  * Do not show send button when there is only new line or empty space in the input.
+  * Do not trim leading white spaces in message text.
+* Optimize lamjs import:
+  * Lazy load the audio converting processor(lamejs) only when `isVoiceMessageEnabled` is true.
+  * This saves 106KB Gzipped(85KB Brotli) if you are not using the VoiceMessage feature.
+
 ## [v3.4.5] (Apr 7 2023)
 
 Features: