Changed RectangularDetectorPixel->GridDetectorPixel in docs #23073

docs/source/api/python/mantid/geometry/RectangularDetectorPixel.rst → docs/source/api/python/mantid/geometry/GridDetectorPixel.rst

 ==========================
- RectangularDetectorPixel
+ GridDetectorPixel
 ==========================
 
-This a python binding to the C++ class Mantid::Geometry::RectangularDetectorPixel.
+This a python binding to the C++ class Mantid::Geometry::GridDetectorPixel.
 
 *bases:* :py:obj:`mantid.geometry.Detector`
 
 .. module:`mantid.geometry`
 
-.. autoclass:: mantid.geometry.RectangularDetectorPixel 
+.. autoclass:: mantid.geometry.GridDetectorPixel 
     :members:
     :undoc-members:
     :inherited-members: