This bumps the versions of the following default themes for coordinated release with WordPress 6.8.2:
- Twenty Twelve: `4.6`
- Twenty Fourteen: `4.3`
- Twenty Sixteen: `3.6`
- Twenty Twenty-One: `2.6`
- Twenty Twenty-Five: `1.3`
Reviewed by peterwilsoncc, poena.
Merges [60452], [60453], [60454], [60455] and [60456] to the 6.8 branch.
Props peterwilsoncc, audrasjb, poena, sabernhardt.
Fixes#63681.
Built from https://develop.svn.wordpress.org/branches/6.8@60457
git-svn-id: http://core.svn.wordpress.org/branches/6.8@59793 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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