Update index.rst

Added period.

Author: jeanniefinks

docs/index.rst

@@ -64,7 +64,7 @@ To contribute to Neural Magic documentation, please:
 
 - Open a `GitHub issue <https://github.com/neuralmagic/docs/issues />`_ and give it the `documentation` label.
 - Submit a `pull request <https://github.com/neuralmagic/docs/pulls />`_ with your proposed documentation changes.
-- Get started with `writing and formatting on GitHub <https://help.github.com/en/github/writing-on-github/getting-started-with-writing-and-formatting-on-github />`_
+- Get started with `writing and formatting on GitHub <https://help.github.com/en/github/writing-on-github/getting-started-with-writing-and-formatting-on-github />`_.
 
 To learn more about Neural Magic, `check our website <https://www.neuralmagic.com />`_.