Update cmake-multi-platform.yml

Author: TheNicker

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

@@ -70,7 +70,7 @@ jobs:
 
       - name: Configure CMake
         run: >
-          cmake -S . -B ${{ steps.vars.outputs.dir }}
+          cmake -S . -B ${{ steps.strings.outputs.build-output-dir }}
           -DCMAKE_C_COMPILER=${{ matrix.c_compiler }}
           -DCMAKE_CXX_COMPILER=${{ matrix.cpp_compiler }}
           -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}