[gnome-nibbles] doap: update maintainers

[Michael Catanzaro <mcatanzaro src gnome org>]

commit b15477100df354b72850ee7d7cd0a652bb48d744
Author: Iulian Gabriel Radu <iulian radu67 gmail com>
Date:   Sat Oct 19 20:08:18 2019 +0300

    doap: update maintainers

 gnome-nibbles.doap | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/gnome-nibbles.doap b/gnome-nibbles.doap
index 70ef6cf..f74fe84 100644
--- a/gnome-nibbles.doap
+++ b/gnome-nibbles.doap
@@ -14,17 +14,17 @@
   <category rdf:resource="http://api.gnome.org/doap-extensions#apps"; />
   <programming-language>Vala</programming-language>
 
-  <maintainer>
+  <author>
     <foaf:Person>
       <foaf:name>Michael Catanzaro</foaf:name>
       <foaf:mbox rdf:resource="mailto:mcatanzaro gnome org" />
       <gnome:userid>mcatanzaro</gnome:userid>
     </foaf:Person>
-  </maintainer>
+  </author>
   <maintainer>
     <foaf:Person>
       <foaf:name>Iulian-Gabriel Radu</foaf:name>
-      <foaf:mbox rdf:resource="mailto:iulian radu67 gmail com" />
+      <foaf:mbox rdf:resource="mailto:iulianradu gnome org" />
       <gnome:userid>iulianradu</gnome:userid>
     </foaf:Person>
   </maintainer>