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

Bug: webrtc:12338
Change-Id: Ifaad29ccb63b0f2f3aeefb77dae061ebc7f87e6c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/227024
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34561}
diff --git a/sdk/android/api/org/webrtc/VideoFrame.java b/sdk/android/api/org/webrtc/VideoFrame.java
index bb30069..0066354 100644
--- a/sdk/android/api/org/webrtc/VideoFrame.java
+++ b/sdk/android/api/org/webrtc/VideoFrame.java
@@ -60,8 +60,8 @@
     @Override @CalledByNative("Buffer") void release();
 
     /**
-     * Crops a region defined by |cropx|, |cropY|, |cropWidth| and |cropHeight|. Scales it to size
-     * |scaleWidth| x |scaleHeight|.
+     * Crops a region defined by `cropx`, `cropY`, `cropWidth` and `cropHeight`. Scales it to size
+     * `scaleWidth` x `scaleHeight`.
      */
     @CalledByNative("Buffer")
     Buffer cropAndScale(