revert submodule

Author: chongchonghe

.gitmodules

@@ -3,8 +3,8 @@
 	url = https://github.com/AMReX-Codes/amrex.git
 [submodule "extern/Microphysics"]
 	path = extern/Microphysics
-	url = https://github.com/chongchonghe/Microphysics-fork.git
-	branch = photochemistry
+	url = https://github.com/AMReX-Astro/Microphysics.git
+	branch = development
 [submodule "extern/yaml-cpp"]
 	path = extern/yaml-cpp
 	url = https://github.com/jbeder/yaml-cpp.git