Add category in tracker feed.
Add category in tracker feed.

Signed-off-by: François de Metz <5187da0b934cc25eb2201a3ec9206c24b13cb23b@2metz.fr>

cykl/linuxfr.org,linuxfrorg/linuxfr.org,cykl/linuxfr.org,linuxfrorg/linuxfr.org,linuxfrorg/linuxfr.org,linuxfrorg/linuxfr.org