windows doesn't understand newline escape

Author: dk949

.github/workflows/cmake-multi-platform.yml

@@ -114,7 +114,5 @@ jobs:
 
     - name: Install
       run: |
-        cmake --install ${{ steps.strings.outputs.build-output-dir }} \
-              --config ${{ matrix.build_type }} \
-              --prefix ${{ github.workspace }}/out
+        cmake --install ${{ steps.strings.outputs.build-output-dir }} --config ${{ matrix.build_type }} --prefix ${{ github.workspace }}/out
         ls -R ${{ github.workspace }}/out