info for release 7.4.1

Author: Christian-B

README.md

@@ -1,7 +1,7 @@
 [![PyPi version](https://img.shields.io/pypi/v/sPyNNaker.svg?style=flat)](https://pypi.org/project/sPyNNaker/)
 [![Python Build Status](https://github.com/SpiNNakerManchester/sPyNNaker/workflows/Python%20Actions/badge.svg?branch=master)](https://github.com/SpiNNakerManchester/sPyNNaker/actions?query=workflow%3A%22Python+Actions%22+branch%3Amaster)
 [![C Build Status](https://github.com/SpiNNakerManchester/sPyNNaker/workflows/C%20Actions/badge.svg?branch=master)](https://github.com/SpiNNakerManchester/sPyNNaker/actions?query=workflow%3A%22C+Actions%22+branch%3Amaster)
-[![Documentation Status](https://readthedocs.org/projects/spynnaker/badge/?version=master)](https://spynnaker.readthedocs.io/en/master/?badge=master)
+[![Documentation Status](https://readthedocs.org/projects/spynnaker/badge/?version=7.4.1)](https://spynnaker.readthedocs.io/en/7.4.1)
 [![Coverage Status](https://coveralls.io/repos/github/SpiNNakerManchester/sPyNNaker/badge.svg?branch=master)](https://coveralls.io/github/SpiNNakerManchester/sPyNNaker?branch=master)
 
 sPyNNaker - PyNN Simulations on SpiNNaker Hardware
@@ -21,9 +21,9 @@ depend upon for a complete editable install.
 
 Documentation
 -------------
-[sPyNNaker Python documentation](https://spynnaker.readthedocs.io/)
+[sPyNNaker Python documentation](https://spynnaker.readthedocs.io/en/7.4.1)
 <br>
 [sPyNNaker C documentation](http://spinnakermanchester.github.io/sPyNNaker/c/)
 
-[Combined PyNN8 python documentation](http://spinnakermanchester.readthedocs.io)
+[Combined PyNN8 python documentation](http://spinnakermanchester.readthedocs.io/en/7.4.1)