Add readthedocs link

Author: lyashevska

template/pyproject.toml.jinja

@@ -72,6 +72,9 @@ Issues = "{{ repository_url }}/issues"
 {% if AddChangeLog -%}
 Changelog = "{{ repository_url }}/CHANGELOG.md"
 {%- endif %}
+{% if AddOnlineDocumentation -%}
+ReadTheDocs = "https://{{ package_name }}.readthedocs.io"
+{%- endif %}
 
 [tool.pytest.ini_options]
 testpaths = ["tests"]