message: Update the CUDA version requirement to v10.1.168 -- this
  is where 'cusparseDnVecDescr_t' (used by SparseMatrix) was
  introduced.
diff: @@ -692,7 +692,7 @@ The specific libraries and their options are:
  - CUDA (optional), used when MFEM_USE_CUDA = YES.
  URL: https://developer.nvidia.com/cuda-toolkit
  Options: CUDA_CXX, CUDA_ARCH, CUDA_OPT, CUDA_LIB.
  - Versions: CUDA >= 9.1, older versions may work too.
  + Versions: CUDA >= 10.1.168.
  - HIP (optional), used when MFEM_USE_HIP = YES.
  URL: https://rocm.github.io/ROCmInstall.html
  