Users: Add support for RoboHash Gravatar images in default user profile pics.

Gravatar includes support for RoboHash auto-generated images. This changeset adds it to the built-in feature for user profile images.

See Gravatar docs: https://en.gravatar.com/site/implement/images/.

Props juliobox, audrasjb.
Fixes #57493.

Built from https://develop.svn.wordpress.org/trunk@55238


git-svn-id: http://core.svn.wordpress.org/trunk@54771 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/options-discussion.php

@@ -281,6 +281,7 @@ $avatar_defaults = array(
 	'wavatar'          => __( 'Wavatar (Generated)' ),
 	'monsterid'        => __( 'MonsterID (Generated)' ),
 	'retro'            => __( 'Retro (Generated)' ),
+	'robohash'         => __( 'RoboHash (Generated)' ),
 );
 /**
  * Filters the default avatars.

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.2-alpha-55237';
+$wp_version = '6.2-alpha-55238';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.