donations.rss: fix date in url for first item
donations.rss: fix date in url for first item

git-svn-id: 17125a8678d4534687f0375d9531237ae8283d03@8421 5b7c3c08-40e5-403b-9995-ace06908e4af

boklm/mga-treasurer,boklm/mga-treasurer