Renamed the directtool .rst file. Re #21675

docs/source/techniques/directtools.rst → docs/source/techniques/Directtools Python module.rst

-.. _directtools:
+.. _Directtools Python module:
 
-======================
- :mod:`directtools`
-======================
+==================
+:mod:`directtools`
+==================
 
 :literal:`directtools` is a Python module for quickly plotting standardized :math:`S(Q,E)` color fill plots as well as line profiles (cuts) in constant :math:`Q` and :math:`E`. The module also provides a few utility functions for inspecting the :math:`S(Q,E)` workspace.