Add "limit yourself to one meeting" message

Author: MathyouMB

layouts/_default/registration-office-hours.html

@@ -37,6 +37,14 @@
     });
   </script>
   <h1>Meet our Course Registration Office Hours Volunteers!</h1>
+  <p style="text-align:center">
+    <i
+      >Please limit yourself to one appointment to allow as many students as
+      possible to get help.</i
+    >
+  </p>
+  <br />
+  <br />
   <div class="resume-reviewers">
     {{ range .Site.Data.registration_office_hours_volunteers }}
       <div class="reviewer">