CI: Fix emscripten builds after portable SDK archive became unavailable.
CI: Fix emscripten builds after portable SDK archive became unavailable.

(cherry picked from commit 14b18697e653de80f75af18113033b2086846194)

dougbinks/imgui,bkaradzic/imgui,ggtucker/imgui,Flix01/imgui,nProtect/imgui,bkaradzic/imgui,ocornut/imgui,Flix01/imgui,dougbinks/imgui,nProtect/imgui,ocornut/imgui,burningreggae/imgui,ggtucker/imgui,nProtect/imgui,aimotive/imgui-glfw,Flix01/imgui,ggtucker/imgui,bkaradzic/imgui,aimotive/imgui-glfw,ocornut/imgui,burningreggae/imgui