Use backticks not vertical bars to denote variables in comments for /modules/video_coding

Bug: webrtc:12338
Change-Id: Ia8a9adea291d594e4f59a6a1203a7bfb0758adac
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/227165
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34684}
diff --git a/modules/video_coding/include/video_coding.h b/modules/video_coding/include/video_coding.h
index a7cb50e..df4533e 100644
--- a/modules/video_coding/include/video_coding.h
+++ b/modules/video_coding/include/video_coding.h
@@ -134,10 +134,10 @@
 
   // Sets the maximum number of sequence numbers that we are allowed to NACK
   // and the oldest sequence number that we will consider to NACK. If a
-  // sequence number older than |max_packet_age_to_nack| is missing
+  // sequence number older than `max_packet_age_to_nack` is missing
   // a key frame will be requested. A key frame will also be requested if the
   // time of incomplete or non-continuous frames in the jitter buffer is above
-  // |max_incomplete_time_ms|.
+  // `max_incomplete_time_ms`.
   virtual void SetNackSettings(size_t max_nack_list_size,
                                int max_packet_age_to_nack,
                                int max_incomplete_time_ms) = 0;