[ImgBot] optimizes images

[imgbot[bot]]

Beep boop. Your images are optimized!

Your image file size has been reduced by 39% 🎉

Details

File	Before	After	Percent reduction
/vendor/github.com/moul/protoc-gen-gotemplate/slides/assets/wc.png	123.94kb	73.72kb	40.52%
/vendor/github.com/moul/protoc-gen-gotemplate/slides/assets/session-wc.png	47.71kb	31.72kb	33.51%
Total :	171.66kb	105.44kb	38.57%

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