spell check notifications

runit/notifications-sharelatex/run

 #!/bin/bash
 export SHARELATEX_CONFIG=/etc/sharelatex/settings.coffee
-exec /sbin/setuser www-data /usr/bin/node /var/www/sharelatex/notifcations/app.js >> /var/log/sharelatex/notifcations.log 2>&1
+exec /sbin/setuser www-data /usr/bin/node /var/www/sharelatex/notifications/app.js >> /var/log/sharelatex/notifications.log 2>&1
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