[gnome-games] hacking: Update URLs and software names

[Alexander Mikhaylenko <alexm src gnome org>]

commit ff83bf19c2b2d858856a2319c451301e3bbf29a9
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Fri Dec 4 23:06:26 2020 +0100

    hacking: Update URLs and software names

 HACKING.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/HACKING.md b/HACKING.md
index 1c188056..64ac169c 100644
--- a/HACKING.md
+++ b/HACKING.md
@@ -1,5 +1,5 @@
 # Compilation and Installation Procedure
-You can install this project either manually (by command line) or with 
[Builder](https://wiki.gnome.org/Apps/Builder "GNOME-Builder Wiki").
+You can install this project either manually (by command line) or with 
[Builder](https://wiki.gnome.org/Apps/Builder "GNOME Builder Wiki").
 
 ## Manual installation
 ### Get the official git repository
@@ -8,7 +8,7 @@ git clone https://gitlab.gnome.org/GNOME/gnome-games.git
 ```
 
 ### Get dependencies
-Games always requires the matching version of [retro-gtk](https://gitlab.gnome.org/GNOME/retro-gtk 
"Retro-GTK GitLab"), [libmanette](https:/gitlab.gnome.org/aplazas/libmanette "libmanette GitLab") and 
[libhandy](https://source.puri.sm/Librem5/libhandy "libhandy"), so if you use the master version of Games, 
you need to use the master version of retro-gtk, libmanette and libhandy.
+Games always requires the matching version of [RetroGTK](https://gitlab.gnome.org/GNOME/retro-gtk "RetroGTK 
GitLab"), [libmanette](https://gitlab.gnome.org/GNOME/libmanette "libmanette GitLab") and 
[libhandy](https://gitlab.gnome.org/GNOME/libhandy "libhandy"), so if you use the master version of Games, 
you need to use the master version of RetroGTK, libmanette and libhandy.
 
 ### Prepare compilation
 ```shell