Fix the two spelling errors in our constitution

I guess we'll have to send this to MathSoc then.

about/constitution.xml

@@ -110,7 +110,7 @@ sale.  After a reasonable time, control of the meeting is given to the
 CRO who will manage the election of the President, Vice-President,
 Treasurer, and Secretary, in that order.  Each election shall be
 carried out by secret ballot, in a manner to be decided on by the CRO,
-with the approval of the memberdip.  An accurate count of votes for
+with the approval of the membership.  An accurate count of votes for
 each candidate for each position must be made and recorded by the CRO.
 A simple heads-down-hands-up method is considered acceptable.  As soon
 as possible the CRO will announce the results of the election and the
@@ -287,7 +287,7 @@ of the Club.</li>
 <ol>
 
 <li> The Treasurer shall present to the Club, before the end of each
-accademic term, a complete financial statement of the past period, and
+academic term, a complete financial statement of the past period, and
 a tentative budget for the following academic term.</li>
 
 <li> The Treasurer shall present, as part of the tentative budget, a