Now use short submodule names in .gitmodules

[yantosca]

Name and Institution (Required)

Name: Bob Yantosca Institution: Harvard + GCST

Confirm you have reviewed the following documentation

• [ ] Contributing guidelines

Describe the update

This is a minor update that fixes some incorrect submodule names in the .gitmodules file. We have changed:

[submodule "src/GEOS-Chem"]
[submodule "src/HEMCO"]
[submodule "docs/source/geos-chem-shared-docs"]
[submodule "src/GEOS-Chem/Cloud-J"]

to

[submodule "GEOS-Chem"]
[submodule "HEMCO"]
[submodule "geos-chem-shared-docs"]
[submodule "Cloud-J"]

Expected changes

This is a zero-diff update.

Related Github Issue(s)

NOTE: This PR should be merged immediately after:

• https://github.com/geoschem/geos-chem/pull/2154
• https://github.com/geoschem/cloud-j/pull/2