Update the Iris color picker to version 1.0.7.

Includes a fix for multiple pickers on the same page.
Changes: https://github.com/Automattic/Iris/compare/1.0.6...1.0.7

props mattwiebe.
fixes #30537.
Built from https://develop.svn.wordpress.org/trunk@30650


git-svn-id: http://core.svn.wordpress.org/trunk@30640 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Docs Formatting: Backtick-escape inline code for the `login_form_ . $action` dynamic hook in wp-login.php.

See #30552.

Built from https://develop.svn.wordpress.org/trunk@30651


git-svn-id: http://core.svn.wordpress.org/trunk@30641 1a063a9b-81f0-0310-95a4-ce76da25c4cd