[ImgBot] Optimize images

*Total -- 530.52kb -> 470.84kb (11.25%)

/docs/guides/images/no_ports_sequence.png -- 51.36kb -> 39.55kb (22.99%)
/docs/tutorial-advanced/images/bb_hierarchy.png -- 16.20kb -> 13.15kb (18.84%)
/docs/guides/images/with_ports_sequence.png -- 36.93kb -> 30.41kb (17.66%)
/docs/tutorial-advanced/images/tree_hierarchy.png -- 22.74kb -> 18.91kb (16.83%)
/docs/tutorial-basics/images/t12_groot_models.png -- 92.72kb -> 80.78kb (12.87%)
/static/img/done.png -- 18.06kb -> 15.93kb (11.77%)
/static/img/groot2.png -- 210.98kb -> 191.11kb (9.42%)
/blog/2023-02-08-beta5/split_view.png -- 81.52kb -> 80.98kb (0.67%)

Signed-off-by: ImgBotApp <ImgBotHelp@gmail.com>

Author: ImgBotApp