[Chapel Merge] Improve docs for c_void_ptr

Branch: refs/heads/main
Revision: a591eba
Author: mppf
Link: Unavailable
Log Message:

Merge pull request #19456 from mppf/docs-for-19072

Improve docs for c_void_ptr

Follow-up to #19072

Reviewed by @bradcray - thanks!

Modified Files:
M modules/standard/CTypes.chpl

Compare: https://github.com/chapel-lang/chapel/compare/6c2a83b2eae9...a591eba963e5