Update Slide to 5.5.5 (264)
Update Slide to 5.5.5 (264)

F-Droid did not update Slide automatically because both 5.5.5 and 5.5.4
tag the same vercode 263. Add 5.5.5 manually from the commit that bumped
vercode to 264.

f-droid/fdroiddata,f-droid/fdroiddata,f-droid/fdroid-data