README: update info on patches

README

@@ -110,18 +110,8 @@ In the bug report please include:
 Patches
 =======
 
-Patches should also be submitted to github.com/mate-desktop/pluma. If the patch
-fixes an existing bug, add the patch as an attachment to that bug
-report.
-
-Otherwise, enter a new bug report that describes the patch, and attach
-the patch to that bug report.
-
-Patches should be in unified diff form. (The -u option to GNU diff.)
-
-If you are interested in helping us to develop pluma, please see the
-file 'AUTHOR' for contact information and/or send a message to the pluma
-mailing list. See also the file 'HACKING' for more detailed information.
+Patches should also be submitted to https://github.com/mate-desktop/pluma,
+preferably via pull requests.
 
 
   The pluma team.