Merge pull request #18393 from mppf/prereqs-remove-intro-para
Adjust the intro paragraph for prereqs.rst
It was no longer accurate at least because now we require
C++14 (and other stuff, depending on the configuration, e.g. Python 3.7).
Modified Files: M doc/rst/usingchapel/prereqs.rst Compare: https://github.com/chapel-lang/chapel/compare/14ab465637ee...7597c8660ada