Use absolute path for hashFiles
Use absolute path for hashFiles

https://github.com/actions/cache/issues/753

unboxed/e-petitions,unboxed/e-petitions,unboxed/e-petitions,alphagov/e-petitions,unboxed/e-petitions,alphagov/e-petitions,alphagov/e-petitions,alphagov/e-petitions