message: fix: create build dir for cmake
diff: @@ -67,7 +67,7 @@ runs:
  cd ${{ inputs.mfem-dir }};
  if [[ ${{ inputs.cmake }} == "YES" ]]
  then
  - cd build;
  + mkdir build && cd build;
  cmake .. -DMFEM_USE_MPI=${{ inputs.mpi }} -DMFEM_MPI_NP=2 -DHYPRE_DIR=../../hypre/src/hypre
  else
  make config MFEM_USE_MPI=${{ inputs.mpi }} MFEM_MPI_NP=2 MFEM_DEBUG=${{ inputs.debug }} CPPFLAGS="$CPPFLAGS";
  