fix path

Author: ChristopherHX

.github/workflows/main.yml

@@ -670,7 +670,7 @@ jobs:
         echo SDKROOT=${{ github.workspace }}/${{ secrets.MacOSX1014sdk && 'MacOSX10.14.sdk' || '../MacOSX-SDKs/MacOSX10.13.sdk' }} >> $GITHUB_ENV
     - name: Prepare Legacy sdk
       run: |
-        DEST=$PWD/libcxx64-build/include/cxx
+        DEST="$PWD/libcxx64-build/include/c++"
         cd "$SDKROOT/usr/include"
         #ln -s "$(xcrun --sdk macosx --show-sdk-path)/usr/include/c++" c++
         ln -s "$DEST" c++