ci: pull emscripten v4.0.15 to avoid c++17 errors (#25739)

emscripten-core/emscripten#24850

Signed-off-by: Ramon Roche <mrpollo@gmail.com>

Author: mrpollo

.github/workflows/failsafe_sim.yml

@@ -43,6 +43,7 @@ jobs:
         run: |
           git clone https://github.com/emscripten-core/emsdk.git _emscripten_sdk
           cd _emscripten_sdk
+          git checkout 4.0.15
           ./emsdk install latest
           ./emsdk activate latest