[ImgBot] Optimize images

*Total -- 44.02kb -> 40.42kb (8.19%)

/robmosys_conformant_logo.png -- 20.66kb -> 18.53kb (10.33%)
/docs/images/ReactiveSequence.png -- 5.96kb -> 5.46kb (8.34%)
/docs/images/SequenceStar.png -- 4.53kb -> 4.22kb (6.96%)
/docs/images/ReactiveFallback.png -- 6.11kb -> 5.73kb (6.26%)
/docs/images/SequenceNode.png -- 6.75kb -> 6.48kb (4.09%)

Signed-off-by: ImgBotApp <[email protected]>

Author: ImgBotApp