Adds myself to the list of authors of this app.

Signed-off-by: Cyrille Bollu <cyrpub@bollu.be>

appinfo/info.xml

@@ -24,6 +24,7 @@
 	<author mail="jus@bitgrid.net">Julius Härtl</author>
 	<author mail="jonas@violoncello.ch" homepage="https://violoncello.ch">Jonas Sulzer</author>
 	<author mail="hey@jancborchardt.net" homepage="https://jancborchardt.net">Jan-Christoph Borchardt</author>
+	<author mail="cyrpub@bollu.be">Cyrille Bollu</author>
 	<namespace>Social</namespace>
 	<category>social</category>
 	<website>https://github.com/nextcloud/social</website>