fix: enable markdown processing in center tags and disable directory urls for V2 to resolve image rendering issues

docs/prometheus.md

@@ -147,7 +147,7 @@ Thanos Metrics with prometheus in Kubernetes environments.
 - [==grafana.com: Get started with Prometheus with these three easy projects==](https://grafana.com/blog/2021/01/08/get-started-with-prometheus-with-these-three-easy-projects/)
 - [fosstechnix.com: Install Prometheus and Grafana on Ubuntu 24.04 LTS 🌟](https://www.fosstechnix.com/install-prometheus-and-grafana-on-ubuntu-24-04/)
 
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 [![prometheus architecture](images/prometheus-architecture.png)](https://github.com/prometheus/prometheus)
 
@@ -790,7 +790,7 @@ JMeter|Artemis Grafana|Artemis Dashboard
 <details>
   <summary>Click to expand!</summary>
 
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 <iframe width="560" height="315" src="https://www.youtube.com/embed/h4Sl21AKiDg" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
 <iframe width="560" height="315" src="https://www.youtube.com/embed/QoDqxm7ybLc" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
@@ -805,7 +805,7 @@ JMeter|Artemis Grafana|Artemis Dashboard
 <details>
   <summary>Click to expand!</summary>
 
-<center>
+<center markdown="1">
 
 <blockquote class="twitter-tweet"><p lang="en" dir="ltr">Over the last months we have added a lot of functionalities to <a href="https://twitter.com/PrometheusIO?ref_src=twsrc%5Etfw">@PrometheusIO</a> to help admins limit the risks of targets blowing up servers ⬇️</p>&mdash; Julien Pivotto (@roidelapluie) <a href="https://twitter.com/roidelapluie/status/1458698615082344451?ref_src=twsrc%5Etfw">November 11, 2021</a></blockquote> <script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>