feat: downgrade emsdk again

Author: codeart1st

.github/actions/prepare-build-env/action.yml

@@ -9,8 +9,8 @@ runs:
       run: |
         git clone https://github.com/emscripten-core/emsdk.git
         cd emsdk
-        ./emsdk install 4.0.1
-        ./emsdk activate 4.0.1
+        ./emsdk install 3.1.67
+        ./emsdk activate 3.1.67
         source ./emsdk_env.sh
         # Export emsdk environment variables
         echo "PATH=$PATH" >> $GITHUB_ENV