Upgrade/Install: Add missing escaping function for `get_option( 'home…

…' )` in `upgrade.php`.

Props dilipbheda.
Fixes #59199.




git-svn-id: https://develop.svn.wordpress.org/trunk@56473 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/upgrade.php

@@ -72,7 +72,7 @@
 
 <h1><?php _e( 'No Update Required' ); ?></h1>
 <p><?php _e( 'Your WordPress database is already up to date!' ); ?></p>
-<p class="step"><a class="button button-large" href="<?php echo get_option( 'home' ); ?>/"><?php _e( 'Continue' ); ?></a></p>
+<p class="step"><a class="button button-large" href="<?php echo esc_url( get_option( 'home' ) ); ?>/"><?php _e( 'Continue' ); ?></a></p>
 
 	<?php
 elseif ( ! $php_compat || ! $mysql_compat ) :