Additional Documentation section header

Author: softwareengineerprogrammer

README.rst

@@ -299,8 +299,8 @@ Monte Carlo
 
 `Monte Carlo User Guide <https://softwareengineerprogrammer.github.io/GEOPHIRES-X/Monte-Carlo-User-Guide.html>`__
 
-Other Documentation:
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+Additional Documentation
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 The `GEOPHIRES v2.0 (previous version's) user manual <References/GEOPHIRES%20v2.0%20User%20Manual.pdf>`__ describes GEOPHIRES's high-level software architecture.
 
 Theoretical basis for GEOPHIRES:  `GEOPHIRES v2.0: updated geothermal techno‐economic simulation tool <References/Beckers%202019%20GEOPHIRES%20v2.pdf>`__