fix: add missing anchor tag

Signed-off-by: Bryan Behrenshausen <[email protected]>

Author: semioticrobotic

index.html

@@ -44,7 +44,7 @@ <h1>Open source software from SAS</h1>
 <div class="grid-container thirds">
 	<div>
 		<h2>Featured projects</h2>
-		<p>Browse some of our most popular open source projects. <a href="https://sassoftware.github.io/contributor-handbook.html" title="SAS Open Source Contributor Handbook">Contributions welcome.</p>
+		<p>Browse some of our most popular open source projects. <a href="https://sassoftware.github.io/contributor-handbook.html" title="SAS Open Source Contributor Handbook">Contributions welcome.</a></p>
 	</div>
 	<div class="boxed">
 		<h6>yj-valid8r</h6>