[ImgBot] Optimize images (#84)

* [ImgBot] Optimize images

*Total -- 586.17kb -> 539.47kb (7.97%)

/source/image/WuHan-love.png -- 101.47kb -> 77.31kb (23.81%)
/source/image/WuHan2020-PWA-3.jpg -- 43.75kb -> 40.25kb (8%)
/source/image/WuHan2020-PWA-0.jpg -- 122.26kb -> 115.85kb (5.24%)
/source/image/WuHan2020-PWA-4.jpg -- 75.99kb -> 72.25kb (4.92%)
/source/image/WuHan2020-PWA-2.jpg -- 91.65kb -> 87.20kb (4.85%)
/source/image/WuHan2020-PWA-1.jpg -- 107.02kb -> 103.27kb (3.51%)
/source/image/wuhan2020.png -- 19.71kb -> 19.39kb (1.61%)
/source/image/wuhan2020-mini.png -- 24.32kb -> 23.95kb (1.53%)

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

* Optimised images with calibre/image-actions

Co-authored-by: Imgbot <help@imgbot.net>
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: 3 people