style: wrap the m_cbc brief comment the typo fix pushed over the limit

"CBC" -> "CBCs" took the line to 133 characters, one past the 132 the
formatter enforces, so the Formatting check failed on a file this
branch does not otherwise touch.

Author: sbryngelson

src/simulation/m_cbc.fpp

@@ -2,7 +2,8 @@
 !! @file
 !! @brief Contains module m_cbc
 
-!> @brief Characteristic boundary conditions (CBCs) for slip walls, non-reflecting subsonic inflow/outflow, and supersonic boundaries
+!> @brief Characteristic boundary conditions (CBCs) for slip walls, non-reflecting subsonic inflow/outflow, and supersonic
+!! boundaries
 #:include 'case.fpp'
 #:include 'macros.fpp'