Update vale in image to 2.4.0
Updates Vale to 2.4.0, which implements a feature I requested which could make for simpler yet more powerful rules: https://github.com/errata-ai/vale/issues/233#issuecomment-694464830
Updates Vale to 2.4.0, which implements a feature I requested which could make for simpler yet more powerful rules: https://github.com/errata-ai/vale/issues/233#issuecomment-694464830