Update doc

build/obs/README

@@ -23,12 +23,13 @@ To submit a snapshot for building, we should have a service file with content
   <service name="download_src_package">
     <param name="host">www.dolibarr.org</param>
     <param name="protocol">http</param>
-    <param name="path">/files/stable/package_rpm_generic/dolibarr-3.3.2-3.src.rpm</param>
+    <param name="path">/files/stable/package_rpm_generic/dolibarr-x.y.z-3.src.rpm</param>
   </service>
 </services>
 
-How to have such a service ?
-Try to make "Add file" and select Remote URL and enter http://www.dolibarr.org/files/stable/package_rpm_generic/dolibarr-3.3.2-3.src.rpm
+How to have such a service file created automatically ?
+Click on "Add file", then select mode "Upload From: Remote URL"
+Enter the Remote URL that should looks like this: http://www.dolibarr.org/files/stable/package_rpm_generic/dolibarr-x.y.v-3.src.rpm
 
 Then add into advanded - attributes
 OBS:Screenshots http://www.dolibarr.org/images/dolibarr_screenshot1.png