requirements instead of prerequists

docs/source/installation.rst

@@ -8,10 +8,10 @@ the tools.
 
 A more detailed step-by-step instruction can be found in the :ref:`tutorial`.
 
-Prerequisites
--------------
+Package Requirements
+--------------------
 
-Prerequisites can be categorized into three types:
+Requirements can be categorized into three types:
 
 1. Those required to run the the general tool chain,
 2. Those required by the notebooks themselves,