Update check marks to reflect new unit test [ci skip]

README.md

     * __Events__
         * [/events/create/](#eventscreate) :white_check_mark:
         * [/events/view/:eventid](#eventsvieweventid) :white_check_mark:
-        * [/events/edit/:eventid](#eventsediteventid)
+        * [/events/edit/:eventid](#eventsediteventid) :white_check_mark:
         * [/events/pending/](#eventspending) :white_check_mark:
         * [/events/accepted/](#eventsaccepted) :white_check_mark:
         * [/events/declined/](#eventsdeclined) :white_check_mark: