[ImgBot] Optimize images

Beep boop. Your images are optimized!

Your image file size has been reduced by 18% 🎉

Details

File	Before	After	Percent reduction
/schema/language-icon-high.png	2.44kb	1.45kb	40.38%
/schema/language-icon.png	3.66kb	2.21kb	39.77%
/img/fiware-supermarket.png	19.59kb	15.08kb	23.01%
/img/fiware-farm.png	16.20kb	12.61kb	22.15%
/img/fiware.png	9.45kb	8.04kb	14.92%
/img/video-logo.png	22.35kb	20.90kb	6.48%
Total :	73.69kb	60.29kb	18.18%

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