Cross-reference HdyDeck in documentation comments

Mention it in @See_also section of HdySwipeable, HdySwipeGroup and
HdySwipeTracker.

Signed-off-by: Alexander Mikhaylenko <alexm@gnome.org>
12 jobs for master in 16 minutes and 12 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Build
passed #250571
librem5
api-visibility

00:02:56

passed #250573
librem5
build-debian-clang

00:04:14

passed #250572
librem5
build-debian-gcc

00:03:12

passed #250574
librem5
build-fedora-gcc

00:04:08

 
  Test+Docs
passed #250575
librem5
build-gtkdoc

00:02:24

passed #250576
librem5
unit-test

00:02:20

42.0%
 
  Package
passed #250577
librem5
package-debian-buster

00:02:30

passed #250578
librem5:arm64
package-debian-buster:arm64

00:06:42

passed #250579
flatpak
package-flatpak

00:02:07

 
  Test Package
passed #250580
librem5
autopkgtest-debian-buster-package

00:02:25

passed #250581
librem5
lintian-debian-buster-package

00:00:55

 
  Deploy
passed #250582
librem5
publish-docs

00:00:26