Add paypal link

content/get-involved.mdx

@@ -1,3 +1,4 @@
+
 **Everyone at the University of Waterloo is welcome to come to our events and to
 use our resources!** Feel free to join our communities and chat with our
 members. However, if you want to officially become a member or support our
@@ -22,7 +23,15 @@ That's all! After your account created, you'll have access to all the
 #### Membership Renewal
 
 If you are already a member of the CSC and want to renew your membership, you
-can do so by coming in person to our office.
+can do so by coming in person to our office. You may also renew your membership 
+online, though you must pay more than the usual $2.00 to cover PayPal fees. 
+A one-term renewal via PayPal comes out to $2.37.
+
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post">
+  <input type="hidden" name="cmd" value="_s-xclick"/>
+  <input type="hidden" name="hosted_button_id" value="9065852"/>
+  <input type="image" src="/images/get-involved/renew-paypal.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!"/>
+</form>
 
 </details>