update ios webrtc

Author: Brazol

ios/stream_webrtc_flutter.podspec

@@ -18,7 +18,7 @@ A new flutter plugin project.
   s.vendored_frameworks = 'Frameworks/StreamWebRTC.xcframework'
   s.prepare_command = <<-CMD
     mkdir -p Frameworks/
-    curl -sL "https://github.com/GetStream/stream-video-swift-webrtc/releases/download/137.0.54/StreamWebRTC.xcframework.zip" -o Frameworks/StreamWebRTC.zip
+    curl -sL "https://github.com/GetStream/stream-video-swift-webrtc/releases/download/137.0.42/StreamWebRTC.xcframework.zip" -o Frameworks/StreamWebRTC.zip
     unzip -o Frameworks/StreamWebRTC.zip -d Frameworks/
     rm Frameworks/StreamWebRTC.zip
   CMD