Update src/maintainer/knowledge_base.rst

Co-authored-by: Leo Fang <[email protected]>

Author: carterbox

src/maintainer/knowledge_base.rst

@@ -683,10 +683,10 @@ Without a preferred ``nompi`` variant, recipes that require mpi are much simpler
 MPI Compilers
 ^^^^^^^^^^^^^
 
-Do not use the `[openmpi,mpich]-mpicc` metapackages in the `requirements/build` section
-of a recipe; the mpi compiler wrappers are included in the main openmpi/mpich packages.
-Add openmpi/mpich to the `requirements/host` section and use compiler directives for the 
-corresponding compilers in `requirements/build` as normal.
+Do not use the ``[openmpi,mpich]-[mpicc, mpicxx, mpifort]`` metapackages in the ``requirements/build`` section
+of a recipe; the MPI compiler wrappers are included in the main ``openmpi``/``mpich`` packages.
+As shown above, just add ``openmpi``/``mpich`` to the ``requirements/host`` section and use compiler directives for the 
+corresponding compilers in ``requirements/build`` as normal.
 
 
 OpenMP