Text Changes: Replace "webmaster" with "site admin" in `register_new_user()`.

Follow-up to [48049], accidentally reverted in [48059].

Props kebbet.
See #50394.
Built from https://develop.svn.wordpress.org/trunk@48066


git-svn-id: http://core.svn.wordpress.org/trunk@47833 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/user.php

@@ -2574,7 +2574,7 @@ function register_new_user( $user_login, $user_email ) {
 			'registerfail',
 			sprintf(
 				/* translators: %s: Admin email address. */
-				__( 'Couldn&#8217;t register you&hellip; please contact the <a href="mailto:%s">webmaster</a>!' ),
+				__( 'Couldn&#8217;t register you&hellip; please contact the <a href="mailto:%s">site admin</a>!' ),
 				get_option( 'admin_email' )
 			)
 		);

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.5-alpha-48065';
+$wp_version = '5.5-alpha-48066';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.