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

Bug: webrtc:12338
Change-Id: I300ba78fc4423db7030e555d7e51d2cb2246e9a4
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/227162
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34678}
diff --git a/modules/desktop_capture/desktop_and_cursor_composer.h b/modules/desktop_capture/desktop_and_cursor_composer.h
index 8f95721..a027058 100644
--- a/modules/desktop_capture/desktop_and_cursor_composer.h
+++ b/modules/desktop_capture/desktop_and_cursor_composer.h
@@ -35,7 +35,7 @@
  public:
   // Creates a new composer that captures mouse cursor using
   // MouseCursorMonitor::Create(options) and renders it into the frames
-  // generated by |desktop_capturer|.
+  // generated by `desktop_capturer`.
   DesktopAndCursorComposer(std::unique_ptr<DesktopCapturer> desktop_capturer,
                            const DesktopCaptureOptions& options);