Update .gitmodule (#4)

* Adopt progsigma "Add prognostic cumulus closure description in saSAS ufs-community#1187"
https://github.com/ufs-community/ufs-weather-model/pull/1187/files
	modified:   FV3
	modified:   tests/default_vars.sh
	modified:   tests/opnReqTests/dcp.sh
	modified:   tests/parm/control.nml.IN
	new file:   tests/parm/field_table/field_table_gfsv16_progsigma

* modified:   .gitmodules

	modified:   .gitmodules

.gitmodules

@@ -1,6 +1,6 @@
 [submodule "FV3"]
   path = FV3
-  url = https://github.com/bluefinweiwei/fv3atm
+  url = https://github.com/DTC-phytne/fv3atm
   branch = progsigma
 [submodule "WW3"]
   path = WW3