Add period to the end of an assignment

src/components/Assignment/Assignment.js

@@ -6,7 +6,7 @@ import RelativeTime from "react-relative-time";
 export default function Assignment({ by, to, datetime }){
 	return (
 		<Typography>
-			<b>{by}</b> assigned this to <b>{to}</b> <RelativeTime value={new Date(datetime)} />
+			<b>{by}</b> assigned this to <b>{to}</b> <RelativeTime value={new Date(datetime)} />.
 		</Typography>
 	);
 }