Fix code markup in FAQ.

doc/faq.rst

@@ -7,7 +7,7 @@ I'm using Django 1.11+ and ``monkeytype run manage.py test`` generates no traces
 Django 1.11 enabled parallel test runs by default. This means your tests run in
 separate subprocesses; MonkeyType is tracing only the main supervisor process,
 which runs only Django code (that is excluded from tracing by the default code
-filter). To get traces, use `--parallel 1` when running your tests under
+filter). To get traces, use ``--parallel 1`` when running your tests under
 MonkeyType tracing.
 
 I'm using Django, and I get an AppRegistryNotReady exception when I run monkeytype.