stochastic_physics external is in ESCOMP org (#193)

* stochastic_physics external is in ESCOMP org

We no longer need to point to Ian's fork of stochastic_physics, the same tag
has been moved to ESCOMP

* Also update MARBL to latest tag

The difference between marbl0.47.0 and marbl0.47.1 is limited to the YAML /
JSON files that dictate what fields are added to the diag_table, so I'm okay
with piggybacking on an existing PR to update other externals

.gitmodules

@@ -7,15 +7,15 @@
 
 [submodule "stochastic_physics"]
   path = externals/stochastic_physics
-  url = https://github.com/iangrooms/stochastic_physics.git
-  fxDONOTUSEurl = https://github.com/iangrooms/stochastic_physics.git
+  url = https://github.com/ESCOMP/stochastic_physics.git
+  fxDONOTUSEurl = https://github.com/ESCOMP/stochastic_physics.git
     fxtag = ocn_skeb_240807
     fxrequired = AlwaysRequired
 
 [submodule "MARBL"]
   path = externals/MARBL
   url = https://github.com/marbl-ecosys/MARBL.git
   fxDONOTUSEurl = https://github.com/marbl-ecosys/MARBL.git
-    fxtag = marbl0.47.0
+    fxtag = marbl0.47.1
     fxrequired = AlwaysRequired