[Chapel Merge] Update docs for 'by' and '#' on ranges to indicate

Branch: refs/heads/main
Revision: c346493
Author: bradcray
Link: Unavailable
Log Message:

Merge pull request #20621 from bradcray/doc-by-count-any-integral

Update docs for 'by' and '#' on ranges to indicate support for any integral

[reviewed by @bmcdonald3 — thanks!]

In this release we updated 'by' and '#' on ranges to take any integral
(or boolean, which they had before), but failed to update the spec
to reflect that. Taking care of that here, now.

Modified Files:
M doc/rst/language/spec/ranges.rst

Compare: https://github.com/chapel-lang/chapel/compare/1b5d5a514030...c346493c1204