Fix 'Trailing spaces' issue in .github\workflows\android.yml

[CodeFactor](https://www.codefactor.io/repository/github/brainer3220/itmmunity) found an issue: Trailing spaces

It's currently on:
[.github\workflows\android.yml:22](https://www.codefactor.io/repository/github/brainer3220/itmmunity/source/master/.github/workflows/android.yml#L22)