[Chapel Merge] Update the docs version button w.r.t. the staged 1

Branch: refs/heads/master
Revision: ae101f4
Author: bradcray
Log Message:

Merge pull request #16575 from bradcray/update-docs-button-part1-1.23

Update the docs version button w.r.t. the staged 1.23 docs

[trivial, not reviewed]

Modified Files:
M doc/rst/conf.py
M doc/util/versionButton.php

Compare: https://github.com/chapel-lang/chapel/compare/0632718a8344...ae101f4727a4