[atkmm] README.md: Add another link to jhbuild

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 858c94b03eeab3e8fe93b47848c036d910d07b6a
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Wed Jul 20 13:10:17 2022 +0200

    README.md: Add another link to jhbuild

 README.md | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)
---
diff --git a/README.md b/README.md
index 4e58a27..80a9bef 100644
--- a/README.md
+++ b/README.md
@@ -36,7 +36,7 @@ files used by Autotools.
   $ cd your_builddir
 ```
 If the tarball was made with Autotools, you must enable maintainer-mode:
-```  
+```
   $ meson configure -Dmaintainer-mode=true
 ```
 
@@ -52,7 +52,7 @@ If the tarball was made with Autotools:
   $ ./configure --prefix=/some_directory
 ```
 If the tarball was made with Meson, you must enable maintainer-mode:
-```  
+```
   $ ./autogen.sh --prefix=/some_directory
 ```
 Then, regardless of how the tarball was made:
@@ -66,8 +66,9 @@ Building from git can be difficult so you should prefer building from
 a release tarball unless you need to work on the atkmm code itself.
 
 jhbuild can be a good help
-  https://gitlab.gnome.org/GNOME/jhbuild
-  https://wiki.gnome.org/Projects/Jhbuild
+- https://gitlab.gnome.org/GNOME/jhbuild
+- https://wiki.gnome.org/Projects/Jhbuild
+- https://gnome.pages.gitlab.gnome.org/jhbuild
 
 ### Building from git with Meson
 
@@ -82,8 +83,8 @@ files used by Autotools.
   $ ninja install
 ```
 You can create a tarball like so:
-``` 
- $ ninja dist
+```
+  $ ninja dist
 ```
 ### Building from git with Autotools
 ```