Update practicebank.yaml

Author: eldridgejm

problems/practicebank.yaml

@@ -1,7 +1,6 @@
 description: |
   <div class="alert alert-primary" role="alert">
-      This set of practice problems is new this quarter. <b>Please let us know
-          on Campuswire if you find any errors or have any suggestions</b>.
+      <b>Please let us know on the message board if you find any errors or have any suggestions</b>.
   </div>
 
 tagsets: