chore: update README.md

README.md

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-<h1 style="border-bottom: none;">go-jobqueue</h1>
+<h1 style="border-bottom: 0;">go-jobqueue</h1>
 
 A durable embedded job queue for Go applications built on top of [BadgerDB](https://github.com/dgraph-io/badger).
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@@ -14,7 +14,7 @@ A durable embedded job queue for Go applications built on top of [BadgerDB](http
     <img src="https://pkg.go.dev/badge/argus-labs/go-jobqueue.svg" alt="Go Reference" />
 </a>
 </div>
-<hr/>
+---
 
 
 **go-jobqueue** is designed to be a lightweight and portable alternative to a full-fledged job queue like [RabbitMQ]