Typo

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

proposals/4230-animated-image-flag.md

@@ -4,7 +4,7 @@ Since animated images are thumbnailed to a still image, clients need to download
 image in order to display it animated. However, there is currently no way of telling that
 an image is animated without downloading the original image. This means that clients wishing
 to display the image as animated must download the original image for any image format which
-is capabale of being animated. This means they download the full size image for non-animated
+is capable of being animated. This means they download the full size image for non-animated
 images even when the user never chooses to enlarge the image.
 
 Even clients that animate images on hover must pre-fetch the full size image if they want the