Updated e3md to latest devel commit

Author: muhrin

README.md

@@ -1,7 +1,7 @@
 # Welcome to CAMML codes
 
 [![Build Status](https://github.com/camml-lab/camml-codes/actions/workflows/tests.yaml/badge.svg)](https://github.com/camml-lab/camml-codes/actions)
-![reax](https://img.shields.io/github/actions/workflow/status/camml-lab/camml-codes/test.yml?job=test_submodules%20(submodule_path%3A%20reax))
+![reax](https://img.shields.io/github/actions/workflow/status/camml-lab/camml-codes/test.yaml?job=test_submodules%20(submodule_path%3A%20reax))
 ![tensorial](https://img.shields.io/github/actions/workflow/status/camml-lab/camml-codes/test.yml?job=test_submodules%20(submodule_path%3A%20tensorial))
 ![e3md](https://img.shields.io/github/actions/workflow/status/camml-lab/camml-codes/test.yml?job=test_submodules%20(submodule_path%3A%20e3md))
 ![e3response](https://img.shields.io/github/actions/workflow/status/camml-lab/camml-codes/test.yml?job=test_submodules%20(submodule_path%3A%20e3response))
@@ -36,12 +36,14 @@ to initialise the codes (submodules), use
 ./codes init
 ```
 
-then, to pip install all of the codes use
+then, to pip install all the codes use
 
 ```bash
 ./codes install
 ```
 
+otherwise, if you prefer to manually install one or more of the codes you can do so using `pip install -Ue <dir>`.
+
 ## Development
 
 This part contains instructions for anyone maintaining this package.