Adds Dependabot update notifications for GitHub Action dependencies, and updates existing dependencies.
dawidd6/action-download-artifact is still kept as a dependency due to the unusual requirement that we specify a GH Actions run id in order to target the right libprimis artifact (https://github.com/actions/download-artifact/issues/229 may be related, and is still an issue).
Adds Dependabot update notifications for GitHub Action dependencies, and updates existing dependencies.
dawidd6/action-download-artifactis still kept as a dependency due to the unusual requirement that we specify a GH Actions run id in order to target the right libprimis artifact (https://github.com/actions/download-artifact/issues/229 may be related, and is still an issue).