Fix CTest work directory

Author: GermanAizek

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

@@ -69,7 +69,7 @@ jobs:
       run: cmake --build ${{ steps.strings.outputs.build-output-dir }}-${{ matrix.os }}-${{ matrix.build_type }} --config ${{ matrix.build_type }}
 
     - name: Test
-      working-directory: ${{ steps.strings.outputs.build-output-dir }}
+      working-directory: ${{ steps.strings.outputs.build-output-dir }}-${{ matrix.os }}-${{ matrix.build_type }}
       # Execute tests defined by the CMake configuration. Note that --build-config is needed because the default Windows generator is a multi-config generator (Visual Studio generator).
       # See https://cmake.org/cmake/help/latest/manual/ctest.1.html for more detail
       run: ctest --build-config ${{ matrix.build_type }}