Add dependabot badge in readme

[dillonstreator]

[dillonstreator]

dependabot/feedback#6 (comment)
badgen/badgen.net#288

This should be working with https://flat.badgen.net/dependabot/osbytes/devy?icon=dependabot

under the hood this is calling: https://api.dependabot.com/badges/status?host=github&repo=${owner}/${repo}

which is https://api.dependabot.com/badges/status?host=github&repo=osbytes/devy

however this gives a 404 🤔