added url and call to action to entries migraiton and model

updated unit tests

tests/Unit/EntryModelTest.php

@@ -11,7 +11,8 @@ it('has correct fillable attributes', function () {
         'is_featured',
         'published_at',
         'content',
-        'category_id',
+        'call_to_action_link',
+        'call_to_action_text',
     ];
 
     $entry = new Entry;