Fixing vale setup

[spier]

We noticed over at InnerSourceCommons/managing-innersource-projects#91 that the vale setup with custom vocabulary files did not work anymore.

The issue was related to a change in the required folder structure for custom vocabulary files. See docs.

Specifics:

In versions of Vale prior to 3.0, vocabularies were stored in <StylesPath>/Vocab.
When upgrading from an older version of Vale, you'll need to move your vocabularies to the new <StylesPath>/config/vocabularies location.

While fixing this, I also made the GH actions that we use in our workflow more stable.

[rrrutledge]

Thank you!