Small docstring update

Signed-off-by: Scott Wilson <scott@propersquid.com>

Author: scott-wilson

src/rust/oiio-sys/src/typedesc.rs

@@ -125,9 +125,9 @@ mod ffi {
         /// indicates an `int[7]` representing the standard
         ///   28-byte encoding of an SMPTE keycode.
         KEYCODE = 6,
-        /// A VEC2 representing a rational number `val[0] / val[1]`
+        /// A `VEC2` representing a rational number `val[0] / val[1]`
         RATIONAL = 7,
-        /// A VEC2[2] or VEC3[2] that represents a 2D or 3D bounds (min/max)
+        /// A `VEC2[2]` or `VEC3[2]` that represents a 2D or 3D bounds (min/max)
         BOX = 8,
     }