fix typo in field name

sed -i 's,Antifeatures,AntiFeatures,g' metadata/*.txt metadata/*.yml
1 job for master in 3 minutes and 38 seconds
Status Job ID Name Coverage
  Test
failed #206538515
lint

00:03:38

 
Name Stage Failure
failed
lint Test
these images have EXIF that must be stripped:
$ git --no-pager diff --stat
metadata/com.b44t.messenger.yml | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
$ git --no-pager diff --name-only --exit-code || export EXITVALUE=1
metadata/com.b44t.messenger.yml
$ ./tools/check-keyalias-collision.py || export EXITVALUE=1
$ exit $EXITVALUE
ERROR: Job failed: exit code 1