Fix Windows Emscripten build instructions in Emscripten-build-instructions.md#817

mcbarton merged 1 commit intocompiler-research:maincompiler-research/CppInterOp:mainfrom

mcbarton:Fix-Windows-Emscripten-build-instructions-newmcbarton/CppInterOp:Fix-Windows-Emscripten-build-instructions-newCopy head branch name to clipboard