Update the Update PHP URL.

Author: johnbillion

output/html/environment.php

@@ -31,7 +31,7 @@ public function output() {
 		if ( $php_warning ) {
 			$append .= sprintf(
 				'&nbsp;<span class="qm-info">(<a href="%s" target="_blank" class="qm-external-link">%s</a>)</span>',
-				'https://wordpress.org/support/upgrade-php/',
+				'https://wordpress.org/support/update-php/',
 				esc_html__( 'Help', 'query-monitor' )
 			);
 			$class   = 'qm-warn';