Fixed spelling error of 'visualziation' to 'visualization' (#1510)

Author: MikeLilley

README.md

@@ -27,7 +27,7 @@ CadQuery is often compared to [OpenSCAD](http://www.openscad.org/). Like OpenSCA
 4. CadQuery scripts require less code to create most objects, because it is possible to locate features based on the position of other features, workplanes, vertices, etc.
 5. CadQuery scripts can build STL, STEP, AMF and 3MF faster than OpenSCAD.
 
-CadQuery was built to be used as a Python library without any GUI. This makes it great for use cases such as integration into servers, or creating scientific and engineering scripts.  Options for visualziation are also available including CQ-Editor and JupyterLab.
+CadQuery was built to be used as a Python library without any GUI. This makes it great for use cases such as integration into servers, or creating scientific and engineering scripts.  Options for visualization are also available including CQ-Editor and JupyterLab.
 
 For those who are interested, the [OCP repository](https://github.com/CadQuery/OCP) contains the current OCCT wrapper used by CQ.