added ref to animal verse block

Author: Antonino Tramontana

src/assets/toolbox_basic.xml

@@ -10,7 +10,8 @@
       </block>
     </value>
   </block>
-  <block type="coderbot_music_note_sol"></block>
+  <block type="coderbot_music_note_basic"></block>
+  <block type="coderbot_animal_verse_basic"></block>
   <block type="coderbot_camera_photoTake"></block>
   <block type="coderbot_camera_videoRec"></block>
   <block type="coderbot_camera_videoStop"></block>