DOC: updated masked_print_option and added explanation (#22013)
DOC: updated masked_print_option and added explanation (#22013)

Fix misspelling in masked_print_option data entry and add explanation on how to
change the value.

Co-authored-by: 渡邉 美希 <3e7833dc2faf48f880aec32fb552fe8e18577fbf@watanabenoMacBook-Pro.local>
Co-authored-by: Ross Barnowski <e9fb290bfd0a4406872fd6103425d9efafcfa051@berkeley.edu>
numpy/numpy,charris/numpy,numpy/numpy,mhvk/numpy,endolith/numpy,mhvk/numpy,charris/numpy,endolith/numpy,mhvk/numpy,charris/numpy,mhvk/numpy,mattip/numpy,mattip/numpy,mattip/numpy,charris/numpy,endolith/numpy,numpy/numpy,mhvk/numpy,numpy/numpy,mattip/numpy,endolith/numpy