fix doc markup

Author: jepler

shared-bindings/synthio/LFO.c

@@ -60,10 +60,10 @@ STATIC const uint16_t triangle[] = {0, 32767, 0, -32767};
 //|     should be considered an implementation detail, though it affects how LFOs
 //|     behave for instance when used to implement an integrator (``l.offset = l``).
 //|
-//|     An LFO's `value` property is computed once when it is constructed, and then
+//|     An LFO's ``value`` property is computed once when it is constructed, and then
 //|     when its associated synthesizer updates it.
 //|
-//|     This means that for instance an LFO **created** with ``offset=1`` has `value==1`
+//|     This means that for instance an LFO **created** with ``offset=1`` has ```value==1``
 //|     immediately, but **updating** the ``offset`` property alone does not
 //|     change ``value``; it only updates through an association with an active synthesizer.
 //|