Revert "slight readme change"

This reverts commit b05db12.

{{cookiecutter.project_slug}}/README.md

@@ -5,7 +5,7 @@
 Create a virtual environment with Python {{cookiecutter.python_version}} and install from git:
 
 ```bash
-pip install git+{{cookiecutter.project_github_pip}}
+pip install {{cookiecutter.project_github_pip}}
 ```
 
 ## Use