[ImgBot] Optimize images

*Total -- 424.27kb -> 270.87kb (36.16%)

/computer-languages/assets/images/dataset-preview.png -- 87.02kb -> 44.08kb (49.34%)
/programming-languages/assets/images/dataset-preview.png -- 64.38kb -> 34.13kb (46.98%)
/data-languages/assets/images/dataset-preview.png -- 72.73kb -> 39.65kb (45.48%)
/markup-languages/assets/images/dataset-preview.png -- 55.26kb -> 31.09kb (43.73%)
/ai-personas/assets/images/api-usage-examples.png -- 44.25kb -> 36.08kb (18.45%)
/ai-personas/assets/images/api-usage-example.png -- 9.18kb -> 7.52kb (18.03%)
/non-latin-locales/assets/images/dataset-preview.png -- 11.22kb -> 9.42kb (16.01%)
/latin-locales/assets/images/dataset-preview.png -- 11.48kb -> 9.78kb (14.87%)
/prose-languages/assets/images/dataset.png -- 49.04kb -> 41.75kb (14.86%)
/project-markers/assets/images/dataset-preview.png -- 18.35kb -> 15.97kb (12.93%)
/assets/images/icons/tag/black/icon16.svg -- 0.46kb -> 0.46kb (0.21%)
/assets/images/icons/tag/white/icon16.svg -- 0.46kb -> 0.46kb (0.21%)
/assets/images/icons/tag/dark-gray/icon16.svg -- 0.46kb -> 0.46kb (0.21%)

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