Use lowercase 't' for consistency in branding.

docs/logo/README.md

 ![](setup_tools_logo_colour.svg)
 ### Design:
 
-SetupTools logo designed in 2020 by [C.Rogers](crogersmedia.com) for the SetupTools project using the Free Open Source graphics editor [Inkscape](inkscape.org).
+Setuptools logo designed in 2020 by [C.Rogers](crogersmedia.com) for the Setuptools project using the Free Open Source graphics editor [Inkscape](inkscape.org).
 
 ### Copyright:
-Logo is (c) the SetupTools developers.
+Logo is (c) the Setuptools developers.
 
 ### Font:
 The font used is the Open Font "Josefin Sans", which is available for free under the Open Font License (OFL).