Merge pull request #32 from cisagov/documentation/fix-broken-link

Fix broken link in `README.md`

Author: jsf9k

README.md

@@ -64,7 +64,7 @@ The Python dependencies are maintained using a
 supported Python version. Changes to requirements should be made to
 the respective `src/py<Python version>/Pipfile`. More information
 about the `Pipfile` format can be found in the [`pipenv`
-documentation](https://pipenv.pypa.io/en/latest/basics/#example-pipfile-pipfile-lock).
+documentation](https://pipenv.pypa.io/en/latest/pipfile.html#example-pipfile).
 The accompanying `Pipfile.lock` files contain the specific dependency
 versions that will be installed. These files can be updated like so
 (using the Python 3.9 configuration as an example):