fix documentation resource formatting

Author: softwareengineerprogrammer

README.rst

@@ -93,9 +93,10 @@ Documentation
 
 GEOPHIRES documentation consists of two primary resources:
 
-* **GEOPHIRES v3 User Manual:** A comprehensive, point-in-time snapshot of the software in PDF format, covering installation, usage, example problems, and parameter lists in detail.
+**GEOPHIRES v3 User Manual:** A comprehensive, point-in-time snapshot of the software in PDF format, covering installation, usage, example problems, and parameter lists in detail.
     * **Link:** `GEOPHIRES_v3_UserManual.pdf <https://github.com/softwareengineerprogrammer/GEOPHIRES/blob/9c7d95648140886609776f154d25a0dcbf240851/References/GEOPHIRES_v3_UserManual.pdf>`__
-* **GEOPHIRES Reference Manual:** A living document with the most current, authoritative information on frequently updated topics like the GEOPHIRES Parameters.
+
+**GEOPHIRES Reference Manual:** A living document with the most current, authoritative information on frequently updated topics like the GEOPHIRES Parameters.
     * **Link:** `nrel.github.io/GEOPHIRES-X <https://nrel.github.io/GEOPHIRES-X/overview.html>`__
 
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