Fix backquotes in iOS docs.

Change-Id: Icd0ef4dbaabc1f312e195cb79cf7f2aa517cb592
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/842657
Auto-Submit: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Commit-Queue: Kevin Lubick <kjlubick@google.com>
1 file changed