dependabot: check for updates to github-actions
dependabot: check for updates to github-actions

To help ensure the actions this project is using are up to date.

Signed-off-by: Kevin Locke <ffb4761cba839470133bee36aeb139f58d7dbaa9@kevinlocke.name>

kevinoid/appveyor-status,kevinoid/appveyor-status,kevinoid/appveyor-status