chore(readme): correct link to contributors section

README.md

@@ -12,7 +12,7 @@ pyNeuroML
 [![Twitter Follow](https://img.shields.io/twitter/follow/NeuroML?style=social)](https://twitter.com/NeuroML)
 [![Gitter](https://badges.gitter.im/NeuroML/community.svg)](https://gitter.im/NeuroML/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
-[![All Contributors](https://img.shields.io/badge/all_contributors-12-orange.svg?style=flat-square)](#contributors-)
+[![All Contributors](https://img.shields.io/badge/all_contributors-12-orange.svg?style=flat-square)](#contributors)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 A single package in Python unifying scripts and modules for reading, writing, simulating and analysing NeuroML2/LEMS models.