Customize Menus: Update capitalization of "next" to match case on the "Next" button.

Props hardeepasrani.
Fixes #42287.

Built from https://develop.svn.wordpress.org/trunk@41954


git-svn-id: http://core.svn.wordpress.org/trunk@41788 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-customize-nav-menus.php

@@ -946,7 +946,7 @@ final class WP_Customize_Nav_Menus {
 		</script>
 
 		<script type="text/html" id="tmpl-nav-menu-submit-new-button">
-			<p id="customize-new-menu-submit-description"><?php _e( 'Click "next" to start adding links to your new menu.' ); ?></p>
+			<p id="customize-new-menu-submit-description"><?php _e( 'Click "Next" to start adding links to your new menu.' ); ?></p>
 			<button id="customize-new-menu-submit" type="button" class="button" aria-describedby="customize-new-menu-submit-description"><?php _e( 'Next' ); ?></button>
 		</script>
 

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9-beta3-41953';
+$wp_version = '4.9-beta3-41954';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.