Attribute <anonymous@example.com> to Anonymous, instead of Joel Dice

.mailmap

@@ -14,9 +14,9 @@ Jason Treadwell <jet@jetp.(none)>
 Jason Treadwell <jet@nonames-power-mac-g4-agp-graphics.local>
 Joel Dice <Joel Dice@joeldicexpvm.(none)>
 Joel Dice <Joel@JDICEVM7.(none)>
-Joel Dice <anonymous@example.com>
 Joel Dice <dicej@bstevenstestnb.readytalk.com>
 Joel Dice <dicej@osxdesktop-2.local>
+Anonymous <anonymous@example.com>
 Joshua Warner <jwarner@radio.ecovate.com>
 Matt Weaver <mweaver@gorgotron.readytalk.com>
 Mike Jensen <jentfoo@gmail.com>