Fix undefined $active variable in nav components

- Set default value for 'active' prop to false in nav-link.blade.php and responsive-nav-link.blade.php.
- This resolves the ErrorException when the prop is not explicitly passed.

resources/views/components/nav-link.blade.php

@@ -1,4 +1,4 @@
-@props(['active'])
+@props(['active' => false])
 
 @php
 $classes = ($active ?? false)

resources/views/components/responsive-nav-link.blade.php

@@ -1,4 +1,4 @@
-@props(['active'])
+@props(['active' => false])
 
 @php
 $classes = ($active ?? false)