about: capitalize D-Feet app name

to match the .desktop file and the updated about menu item label
4 jobs for menu-update in 3 minutes and 1 second (queued for 1 second)
latest
Status Job ID Name Coverage
  Test
passed #161752
fedora

00:02:42

passed #161753
flatpak

00:01:48

 
  Review
passed #161754
review

00:00:19

manual #161755
allowed to fail manual
stop_review