fix: removed , from solution.md date data types

Author: zeel

1-js/05-data-types/11-date/8-format-date-relative/solution.md

@@ -40,7 +40,7 @@ alert( formatDate(new Date(new Date - 30 * 1000)) ); // "30 sec. ago"
 
 alert( formatDate(new Date(new Date - 5 * 60 * 1000)) ); // "5 min. ago"
 
-// yesterday's date like 31.12.2016, 20:00
+// yesterday's date like 31.12.2016 20:00
 alert( formatDate(new Date(new Date - 86400 * 1000)) );
 ```