pkgdown是否支持gif显示？

Question

我之所以这样问，是因为我的小插图https://cran.r-project.org/web/packages/ijtiff/vignettes/reading-and-writing-images.html显示gif没问题，但是相应的pkgdown页面https://ropensci.github.io/ijtiff/articles/reading-and-writing-images.html无法呈现它。