[UNDERTOW-2601] Update staging repository from wildfly-staging to jboss-io

Signed-off-by: Flavia Rainone <frainone@redhat.com>

Author: fl4via

pom.xml

@@ -112,7 +112,7 @@
 
     <properties>
         <!-- Nexus Settings -->
-        <nexus.repository.staging>wildfly-staging</nexus.repository.staging>
+        <nexus.repository.staging>jboss-io</nexus.repository.staging>
         <nexus.repository.release>releases</nexus.repository.release>
         <nexus.staging.tag>undertow-${project.version}</nexus.staging.tag>