add spaceing between lists as per Dina's remark

Signed-off-by: Toshaan Bharvani <toshaan@vantosh.com>

themes/openpowerfoundation/layouts/join/single.html

@@ -32,12 +32,16 @@
           <li>{{ .option }}</li>  
         {{ end }}
     </ul>
+
+	<p>&nbsp;</p>
+
     <p class="membership-levels-text">{{ .Param "membership-levels.text" }}</p>
     <ul class="mb-0 pb-0">
         {{ range .Param "membership-levels.features" }}
            <li>{{ .feature }}</li>
         {{ end }}
     </ul>
+
     <div class="membership-data mt-5">
       {{ .Content }}
     </div>