Disable webrequest for wxWidgets as we don't need it

It requires CURL and doesn't like our static build so it links to the system curl instead which is bad.

deps/wxWidgets/wxWidgets.cmake

@@ -38,6 +38,7 @@ prusaslicer_add_cmake_project(wxWidgets
         -DwxUSE_LIBSDL=OFF
         -DwxUSE_XTEST=OFF
         -DwxUSE_GLCANVAS_EGL=OFF
+        -DwxUSE_WEBREQUEST=OFF
 )
 
 if (MSVC)