Update emscripten.yml

Author: mcbarton

.github/workflows/emscripten.yml

@@ -569,7 +569,7 @@ jobs:
         .\emsdk\emsdk activate ${{matrix.emsdk_ver}}
         .\emsdk\emsdk_env.ps1
         
-        $env:SYSROOT_PATH="$env:EMSDK/emsdk/upstream/emscripten/cache/sysroot"
+        $env:SYSROOT_PATH="$env:EMSDK/upstream/emscripten/cache/sysroot"
         $env:PREFIX="%CONDA_PREFIX%/envs/CppInterOp-wasm"
         $env:CMAKE_PREFIX_PATH=$env:PREFIX
         $env:CMAKE_SYSTEM_PREFIX_PATH=$env:PREFIX