Fix EventLogger audio underrun logging

PiperOrigin-RevId: 327610950

library/core/src/main/java/com/google/android/exoplayer2/util/EventLogger.java

@@ -322,7 +322,7 @@ public class EventLogger implements AnalyticsListener {
     loge(
         eventTime,
         "audioTrackUnderrun",
-        bufferSize + ", " + bufferSizeMs + ", " + elapsedSinceLastFeedMs + "]",
+        bufferSize + ", " + bufferSizeMs + ", " + elapsedSinceLastFeedMs,
         /* throwable= */ null);
   }