updating defaultCopyright to match expression in file

apply-config.sh

@@ -50,4 +50,4 @@ fi
 
 cp /var/www/bigbluebutton-default/LOGO_CSE-FINAL.ico /var/www/bigbluebutton-default/favicon.ico
 
-sed -i 's/defaultCopyright=.*/defaultCopyright="<p>DigitalCSE<\/p>"/g' /var/bigbluebutton/playback/presentation/2.0/playback.js
+sed -i 's/defaultCopyright = .*/defaultCopyright = "<p>DigitalCSE<\/p>"/g' /var/bigbluebutton/playback/presentation/2.0/playback.js