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

Bug: webrtc:12338
Change-Id: I5b23daa5c6122ad1e6902559e64b60b4285595c7
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/226950
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34565}
diff --git a/net/dcsctp/public/strong_alias_test.cc b/net/dcsctp/public/strong_alias_test.cc
index 5c94881..cacb49d 100644
--- a/net/dcsctp/public/strong_alias_test.cc
+++ b/net/dcsctp/public/strong_alias_test.cc
@@ -30,7 +30,7 @@
 namespace {
 
 // For test correctnenss, it's important that these getters return lexically
-// incrementing values as |index| grows.
+// incrementing values as `index` grows.
 template <typename T>
 T GetExampleValue(int index);