Extension icon URL is missing

[lassoan]

The URL is invalid:

OsteotomyPlanner/CMakeLists.txt

Line 11 in dee1c72

set(EXTENSION_ICONURL "https://raw.githubusercontent.com/KitwareMedical/OsteotomyPlanner/master/Planner/Resources/Icons/Planner.png")

[jamesobutler]

This is still an issue for Slicer 5.6.2.

[jamesobutler]

As part of reviewing extension icons in preparation for the upcoming Slicer 5.8 release, I have observed that this icon is still missing.