dix: Fix URL to description of focus in/out model

The current URL points to an unrelated patch for acpid.

Signed-off-by: Povilas Kanapickas <povilas@radix.lt>
4 jobs for fix-focus-in-out-model-doc-url in 5 minutes and 46 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Docker Image
passed #8316709
debian-buster

00:00:09

 
  Build And Test
passed #8316710
autotools

00:05:37

passed #8316711
meson

00:01:52

passed #8316712
meson-noglamor

00:02:14