ENH: Update SPHARM-PDM from revision 8a9aabcd2b287d0f1c3578802f15c6bfd97...

...0d9b6 to 170cc9205152327bf5d4557852450bae35d30745

https://www.github.com/NIRALUser/SPHARM-PDM/compare/8a9aabcd2b287d0f1c3578802f15c6bfd970d9b6%E2%80%A6170cc9205152327bf5d4557852450bae35d30745