[ImgBot] Optimize images

[imgbot[bot]]

Beep boop. Your images are optimized!

Your image file size has been reduced by 89% 🎉

Details

File	Before	After	Percent reduction
/ch1/과학동아.png	15.95kb	0.84kb	94.72%
/ch1/한국일보.png	17.05kb	2.65kb	84.45%
Total :	33.00kb	3.49kb	89.42%

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