Fixed IANA tz database url (#237)

Author: JHoloboski

docs/docs/instantiation.md

@@ -29,8 +29,8 @@ It otherwise can be a `Timezone` instance or simply a string timezone value.
 !!!note
 
     Supported strings for timezones are the one provided
-    by the [IANA time zone database](https://www.iana.org/time-zones>).
-    
+    by the [IANA time zone database](https://www.iana.org/time-zones).
+
     The special `local` string is also supported and will return your current timezone.
 
 !!!warning