Pull request #25: docs update

Merge in WEBRTC/infobip-rtc-android from kgenjac-WEBRTC-2-rename to master

Squashed commit of the following:

commit 71971bda91a0f06d79e13ccb29bdf6e4879759d0
Author: Kenan Genjac <Kenan.Genjac@infobip.com>
Date:   Fri Mar 17 09:33:33 2023 +0100

    docs update

README.md

@@ -492,7 +492,7 @@ We implemented an Android service named `FcmTokenRefresher` that handles changes
 ```xml
 <application>
     <service
-        android:name="com.infobip.webrtc.sdk.impl.fcm.FcmTokenRefresher"
+        android:name="com.infobip.webrtc.sdk.impl.push.FcmTokenRefresher"
         android:exported="false" />
 </application>
 ```