Update join.md

Author: sandragesing

pages/get_involved/join.md

@@ -23,7 +23,7 @@ By joining the US-RSE Association as an individual member you will:
 If you think that you might fit in US-RSE then you probably do and we look forward to welcoming you.</p>
 
 <div class="get-started-wrap" style="margin:auto">
-    <a class="btn btn-warning" href="https://forms.gle/CRsH7sKAk3UvZJfB9" target="_blank" style="margin:40px;">Join the US-RSE Association as an individual member<em>for free</em>!</a>
+    <a class="btn btn-warning" href="https://forms.gle/CRsH7sKAk3UvZJfB9" target="_blank" style="margin:40px;">Join the US-RSE Association as an individual member<em> for free</em>!</a>
 </div>