lists/webapps: fix transmission dependency

There is no package transmission, but actually, it is transmission-daemon
[1], but it provides a command-line interface w/o web interface.

our package turris-webapps-transmission depends on transmission-web,
which depends on transmission-daemon.

[1] https://github.com/openwrt/packages/blob/0250239caf322ba7dc80d13b3629372b0786ba48/net/transmission/Makefile#L140
8 jobs for hbk in 12 minutes and 3 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  Build
passed #539007
lists_generate

00:00:17

passed #539004
medkit_mox

00:12:02

passed #539005
medkit_omnia

00:10:44

passed #539006
medkit_turris1x

00:05:23

passed #539001
prepare_mox

00:04:32

passed #539002
prepare_omnia

00:04:30

passed #539003
prepare_turris1x

00:04:31

 
  Verify
passed #539008
lists_verify

00:00:20