Fixed crash due wrong format specifier.

Bug: None
Change-Id: I80d512242dfd70c57952b3f41150db409ba1ac2c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/215684
Commit-Queue: Kári Helgason <kthelgason@webrtc.org>
Reviewed-by: Kári Helgason <kthelgason@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#33785}
diff --git a/sdk/objc/api/peerconnection/RTCConfiguration.mm b/sdk/objc/api/peerconnection/RTCConfiguration.mm
index fafcd0e..0f0239f 100644
--- a/sdk/objc/api/peerconnection/RTCConfiguration.mm
+++ b/sdk/objc/api/peerconnection/RTCConfiguration.mm
@@ -166,7 +166,7 @@
 - (NSString *)description {
   static NSString *formatString = @"RTC_OBJC_TYPE(RTCConfiguration): "
                                   @"{\n%@\n%@\n%@\n%@\n%@\n%@\n%@\n%@\n%d\n%d\n%d\n%d\n%d\n%d\n"
-                                  @"%d\n%@\n%d\n%d\n%d\n%d\n%d\n%@\n%@\n}\n";
+                                  @"%d\n%@\n%d\n%d\n%d\n%d\n%d\n%d\n%d\n}\n";
 
   return [NSString
       stringWithFormat:formatString,