Added gnome-calendar to Server variant too

comps.xml

@@ -6490,6 +6490,7 @@
       <packagereq variant="Server" type="mandatory">gedit</packagereq>
       <packagereq variant="Server" type="mandatory">gnome-bluetooth</packagereq>
       <packagereq variant="Server" type="mandatory">gnome-calculator</packagereq>
+      <packagereq variant="Server" type="mandatory">gnome-calendar</packagereq>
       <packagereq variant="Server" type="mandatory">gnome-characters</packagereq>
       <packagereq variant="Server" type="mandatory">gnome-classic-session</packagereq>
       <packagereq variant="Server" type="mandatory">gnome-color-manager</packagereq>