docs: update link to glw

GLW is currently living in gitlab, the cgit-page is just a mirror.

Signed-off-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>
diff --git a/docs/faq.html b/docs/faq.html
index 00c17ea..e38d5ec 100644
--- a/docs/faq.html
+++ b/docs/faq.html
@@ -198,7 +198,7 @@
 
 <h3>2.4 Where is the GLw library?</h3>
 <p>
-GLw (OpenGL widget library) is now available from a separate <a href="https://cgit.freedesktop.org/mesa/glw/">git repository</a>.  Unless you're using very old Xt/Motif applications with OpenGL, you shouldn't need it.
+GLw (OpenGL widget library) is now available from a separate <a href="https://gitlab.freedesktop.org/mesa/glw">git repository</a>.  Unless you're using very old Xt/Motif applications with OpenGL, you shouldn't need it.
 </p>