Add badge for Read the Docs

Author: sverhoeven

{{cookiecutter.project_name}}/README.md

@@ -9,10 +9,11 @@
 | (3/5) community registry           | [![RSD](https://img.shields.io/badge/rsd-{{cookiecutter.project_name}}-00a3e3.svg)](https://www.research-software.nl/software/{{cookiecutter.project_name}}) [![workflow pypi badge](https://img.shields.io/pypi/v/{{cookiecutter.project_name}}.svg?colorB=blue)](https://pypi.python.org/project/{{cookiecutter.project_name}}/) |
 | (4/5) citation                     | [![DOI](https://zenodo.org/badge/DOI/<replace-with-created-DOI>.svg)](https://doi.org/<replace-with-created-DOI>) |
 | (5/5) checklist                    | [![workflow cii badge](https://bestpractices.coreinfrastructure.org/projects/<replace-with-created-project-identifier>/badge)](https://bestpractices.coreinfrastructure.org/projects/<replace-with-created-project-identifier>) |
-| howfairis                            | [![fair-software badge](https://img.shields.io/badge/fair--software.eu-%E2%97%8F%20%20%E2%97%8F%20%20%E2%97%8F%20%20%E2%97%8F%20%20%E2%97%8B-yellow)](https://fair-software.eu) |
+| howfairis                          | [![fair-software badge](https://img.shields.io/badge/fair--software.eu-%E2%97%8F%20%20%E2%97%8F%20%20%E2%97%8F%20%20%E2%97%8F%20%20%E2%97%8B-yellow)](https://fair-software.eu) |
 | **Other best practices**           | &nbsp; |
-| Static analysis              | [![workflow scq badge](https://sonarcloud.io/api/project_badges/measure?project={{cookiecutter.github_organization}}_{{cookiecutter.project_name}}&metric=alert_status)](https://sonarcloud.io/dashboard?id={{cookiecutter.github_organization}}_{{cookiecutter.project_name}}) |
-| Coverage              | [![workflow scc badge](https://sonarcloud.io/api/project_badges/measure?project={{cookiecutter.github_organization}}_{{cookiecutter.project_name}}&metric=coverage)](https://sonarcloud.io/dashboard?id={{cookiecutter.github_organization}}_{{cookiecutter.project_name}}) |
+| Static analysis                    | [![workflow scq badge](https://sonarcloud.io/api/project_badges/measure?project={{cookiecutter.github_organization}}_{{cookiecutter.project_name}}&metric=alert_status)](https://sonarcloud.io/dashboard?id={{cookiecutter.github_organization}}_{{cookiecutter.project_name}}) |
+| Coverage                           | [![workflow scc badge](https://sonarcloud.io/api/project_badges/measure?project={{cookiecutter.github_organization}}_{{cookiecutter.project_name}}&metric=coverage)](https://sonarcloud.io/dashboard?id={{cookiecutter.github_organization}}_{{cookiecutter.project_name}}) |
+| Documentation                      | [![Documentation Status](https://readthedocs.org/projects/{{cookiecutter.project_name}}/badge/?version=latest)](https://{{cookiecutter.project_name}}.readthedocs.io/en/latest/?badge=latest) |
 | **GitHub Actions**                 | &nbsp; |
 | Build                              | [![build]({{cookiecutter.repository}}/actions/workflows/build.yml/badge.svg)]({{cookiecutter.repository}}/actions/workflows/build.yml) |
 |  Metadata consistency              | [![cffconvert]({{cookiecutter.repository}}/actions/workflows/cffconvert.yml/badge.svg)]({{cookiecutter.repository}}/actions/workflows/cffconvert.yml) |