Fix typo

doc/source/index.rst

@@ -15,7 +15,7 @@ This project is supported by the `AWS Public Data Set Program <https://aws.amazo
 How to use this documentation
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-**For GEOS-Chem users**, this website contains everything you need in order to use GEOS-Chem on the cloud. You will be able to finish a complete research workflow, from model simulations to output data analysis and management. **If it is your first time trying GEOS-Chem, this project is perhaps your best starting point**, because :ref:`you don't need to do any initial setup <motivation-label>` and the model is guaranteed to work correctly (see :ref:`quick start guide <quick-start-label>`). For more all details about the GEOS-Chem model itself, please refer to our comprehensive `user guide <http://acmg.seas.harvard.edu/geos/doc/man/>`_ and `wiki <http://wiki.seas.harvard.edu/geos-chem/index.php/Main_Page>`_ for 
+**For GEOS-Chem users**, this website contains everything you need in order to use GEOS-Chem on the cloud. You will be able to finish a complete research workflow, from model simulations to output data analysis and management. **If it is your first time trying GEOS-Chem, this project is perhaps your best starting point**, because :ref:`you don't need to do any initial setup <motivation-label>` and the model is guaranteed to work correctly (see :ref:`quick start guide <quick-start-label>`). For more all details about the GEOS-Chem model itself, please refer to our comprehensive `user guide <http://acmg.seas.harvard.edu/geos/doc/man/>`_ and `wiki <http://wiki.seas.harvard.edu/geos-chem/index.php/Main_Page>`_.
 
 **For non-GEOS-Chem-users**, this documentation can be used as an introduction to AWS for scientific computing, especially for **Earth science model simulations**. Since all Earth science models are highly similar from a software perspective, it should be quite easy to adapt this guide for you specific use case. More than 90% of this website is about general AWS concepts and tutorials, which doesn't require GEOS-Chem-specific knowledge. Please get a feeling of cloud computing workflow by exploring :doc:`beginner tutorials <./chapter02_beginner-tutorial/index>` and then refer to the :doc:`developer guide <./chapter04_developer-guide/index>` to build your own model. Although cloud computing has a lot of potential in Earth science, it is still significantly under-utilized due to :doc:`the lack of accessible tutorials <./chapter01_overview/external-resources>` for Earth science researchers. This project tries to fill this gap.