Update plugin.ini

Author: DBinaghi

plugin.ini

@@ -1,7 +1,7 @@
 [info]
 name="Related Content"
 author="Daniele Binaghi"
-description="Suggests Items related to the one currently shown"
+description="Suggests Items related to the one currently shown."
 link="https://github.com/DBinaghi/plugin-RelatedContent"
 support_link="https://github.com/DBinaghi/plugin-RelatedContent/issues"
 omeka_minimum_version="2.0"