[ImgBot] Optimize images

*Total -- 492.65kb -> 449.14kb (8.83%)

/src/go-19/module_package/vendor/github.com/easierway/concurrent_map/map_benchmark.png -- 37.27kb -> 27.80kb (25.4%)
/go-22/channel.png -- 455.38kb -> 421.33kb (7.48%)

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

Author: ImgBotApp