updated the link to students who need to petition from the form to the actual petition page.
updated the link to students who need to petition from the form to the actual petition page.

git-tfs-id: [https://tfs.caes.ucdavis.edu:8088/tfs]$/Commencement/Trunk/Commencement;C8111

ucdavis/Commencement,ucdavis/Commencement,ucdavis/Commencement