5.1 api version being rejected

[ronakdesai]

This is causing the newer minor versions of Ghost to be rejected when making API calls.

[estwanick]

+1

[myjurnee]

+1

[damusix]

@ronakdesai @estwanick @myjurnee use my PR for now: https://github.com/TryGhost/action-deploy-theme/pull/118

        uses: damusix/action-deploy-theme@main
        with:
          api-url: ${{ secrets.GHOST_ADMIN_API_URL }}
          api-key: ${{ secrets.GHOST_ADMIN_API_KEY }}
          version: "5.1"