(Line: 17, Col: 5): Unexpected value 'matrix', (Line: 17, Col: 5): There's not enough info to determine what you meant. Add one of these properties: cancel-timeout-minutes, container, continue-on-error, defaults, env, environment, outputs, runs-on, secrets, services, snapshot, steps, timeout-minutes, uses, with, (Line: 19, Col: 12): Unrecognized named-value: 'matrix'. Located at position 1 within expression: matrix.os, (Line: 19, Col: 12): Unexpected value '${{ matrix.os }}', (Line: 22, Col: 5): A sequence was not expected