Update proposals.html

typo

proposals.html

@@ -58,7 +58,7 @@ <h1><a href="#">Project proposals</a></h1>
 			<header>
 				<h2></h2>
 			</header>
-			<p>There is never a shortage of ideas and project proposals in our group
+			<p>There is never a shortage of ideas and project proposals in our group.
                 <br>
                 Take a look at some of the ideas we have for Master students. 
                 If something catches your eye, get in contact with us!