Convert replaced images to webp format per formatting guidelines

Author: docrinehart

getting_started/first_3d_game/09.adding_animations.rst

@@ -621,18 +621,18 @@ And the *Mob*'s script.
 .. |image8| image:: img/09.adding_animations/07.editable_timeline.webp
 .. |image9| image:: img/09.adding_animations/08.zoom_slider.webp
 .. |image10| image:: img/09.adding_animations/09.creating_first_keyframe.webp
-.. |image11| image:: img/09.adding_animations/10.initial_keys.png
-.. |image12| image:: img/09.adding_animations/11.moving_keys.png
+.. |image11| image:: img/09.adding_animations/10.initial_keys.webp
+.. |image12| image:: img/09.adding_animations/11.moving_keys.webp
 .. |image13| image:: img/09.adding_animations/12.second_keys_values.webp
-.. |image14| image:: img/09.adding_animations/13.second_keys.png
+.. |image14| image:: img/09.adding_animations/13.second_keys.webp
 .. |image15| image:: img/09.adding_animations/14.play_button.png
-.. |image16| image:: img/09.adding_animations/15.box_select.png
+.. |image16| image:: img/09.adding_animations/15.box_select.webp
 .. |image17| image:: img/09.adding_animations/16.easing_property.png
 .. |image18| image:: img/09.adding_animations/17.ease_out.png
 .. |image19| image:: img/09.adding_animations/18.ease_out_second_rotation_key.png
 .. |image20| image:: img/09.adding_animations/19.ease_in_second_translation_key.png
 .. |image21| image:: img/09.adding_animations/20.float_animation.gif
 .. |image22| image:: img/09.adding_animations/21.script_icon.png
-.. |animation_final_keyframes| image:: img/09.adding_animations/animation_final_keyframes.png
-.. |second_keys_both| image:: img/09.adding_animations/second_keys_both.png
-.. |timeline_05_click| image:: img/09.adding_animations/timeline_05_click.png
+.. |animation_final_keyframes| image:: img/09.adding_animations/animation_final_keyframes.webp
+.. |second_keys_both| image:: img/09.adding_animations/second_keys_both.webp
+.. |timeline_05_click| image:: img/09.adding_animations/timeline_05_click.webp