Update emscripten.yml

Author: mcbarton

.github/workflows/emscripten.yml

@@ -825,8 +825,7 @@ jobs:
         $env:PATH="$PWD.Path;$env:PATH"
         cd ..
         Invoke-WebRequest -Uri "https://download.mozilla.org/?product=firefox-latest-ssl&os=win64&lang=en-US" -OutFile "firefox-setup.exe"
-        choco install 7zip.install
-        7zz x "firefox-setup.exe"
+        "C:\Program Files\7-Zip\7z.exe" x "firefox-setup.exe"
         cd .\core\
         $env:PATH="$PWD.Path;$env:PATH"
         cd ..