net-im/go-sendxmpp: add myself as a maintainer

Signed-off-by: Niklaus 'vimja' Hofer <gentoo-bugzilla@vimja.email>

net-im/go-sendxmpp/metadata.xml

@@ -1,6 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
 <pkgmetadata>
+	<maintainer type="person">
+		<email>gentoo-bugzilla@vimja.email</email>
+		<name>Niklaus 'vimja' Hofer</name>
+	</maintainer>
 	<upstream>
 		<bugs-to>https://salsa.debian.org/mdosch/go-sendxmpp/-/issues</bugs-to>
 	</upstream>