Align requirements.txt comments with 4.x

Author: afabiani

requirements.txt

@@ -85,7 +85,7 @@ pinax-notifications==6.0.0
 pinax-ratings==4.0.0
 
 # GeoNode org maintained apps.
-# django-geonode-mapstore-client==4.0.1
+# django-geonode-mapstore-client==4.0.3
 -e git+https://github.com/GeoNode/geonode-mapstore-client.git@master#egg=django_geonode_mapstore_client
 geonode-avatar==5.0.8
 geonode-oauth-toolkit==2.2.2