Update default value of working-directory when is defined in defaults section

[eduardoleolim]

If I have a job with a custom working directory, I must to define the working directory in the emulator step again

jobs:
  name: 🧪 Android Testing
  runs-on: ubuntu-latest
  defaults:
    run:
      working-directory: ./app # Working directory for all steps 
  steps:
    
    ...

    - name: 🧪 Test
      uses: reactivecircus/android-emulator-runner@v2
      with:
        api-level: 35
        arch: x86_64
        target: google_apis
        emulator-port: 5554
        script: ./gradlew connectedAndroidTest
        working-directory: ./app # I have to set working directory again