[gnomemm-website] docs: Replace broken git clone URL with GNOME Gitlab URL

[Andre Klapper <aklapper src gnome org>]

commit fcf805ac1076c48d516a2063544b34e0d8c92532
Author: Andre Klapper <a9016009 gmx de>
Date:   Sun May 24 19:57:12 2020 +0200

    docs: Replace broken git clone URL with GNOME Gitlab URL

 docs/C/git.xml | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/docs/C/git.xml b/docs/C/git.xml
index 711f835..e4c385c 100644
--- a/docs/C/git.xml
+++ b/docs/C/git.xml
@@ -9,15 +9,15 @@
       <para>We use <ulink url="http://git-scm.com/";>Git</ulink> to maintain our source
     code, in the <ulink url="https://www.gnome.org";>GNOME</ulink> Git repository.
     Additional information about git.gnome.org is available at <ulink 
url="https://wiki.gnome.org/Git";>wiki.gnome.org/Git</ulink>.</para>
-      <para>glibmm and gtkmm are in the <ulink 
url="https://git.gnome.org/browse/glibmm/tree/";>glibmm</ulink> and <ulink 
url="https://git.gnome.org/browse/gtkmm/tree/";>gtkmm</ulink> modules.
-    There is also a <ulink 
url="https://git.gnome.org/browse/gtkmm-documentation/tree/";>gtkmm-documentation</ulink> module which 
contains the gtkmm book and its examples. See below for instructions.</para>
+      <para>glibmm and gtkmm are in the <ulink url="https://gitlab.gnome.org/GNOME/glibmm/";>glibmm</ulink> 
and <ulink url="https://gitlab.gnome.org/GNOME/gtkmm/";>gtkmm</ulink> modules.
+    There is also a <ulink 
url="https://gitlab.gnome.org/GNOME/gtkmm-documentation/";>gtkmm-documentation</ulink> module which contains 
the gtkmm book and its examples. See below for instructions.</para>
       <para>You will need to run the autogen.sh script to generate the build files. We
     recommend jhbuild for setting up a separate development prefix.</para>
       <highlights>
         <para><emphasis role="bold">Anonymous Access</emphasis></para>
         <para>For those who do not have a GNOME login, anonymous checkouts are
         available.</para>
-        <para>For instance, to check out the latest version of gtkmm: <command>git clone 
git://git.gnome.org/gtkmm</command></para>
+        <para>For instance, to check out the latest version of gtkmm: <command>git clone 
https://gitlab.gnome.org/GNOME/gtkmm.git</command></para>
       </highlights>
       <sect2>
         <title>Modules and branches</title>