Add blog post about Datadog outage (#53)

* Add blog post about Datadog outage

* Adjust formatting of PR #53

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Co-authored-by: Martin Müller <mail@mueller-martin.net>

htdocs/index.html

@@ -41,6 +41,7 @@ <h2>What is systemd?</h2>
 		<h2>What is so bad about systemd?</h2>
 		<p>List of notable bugs and security issues:</p>
 		<ul>
+			<li><a href="https://newsletter.pragmaticengineer.com/p/inside-the-datadog-outage">Datadog outage costing 5 million dollars caused by systemd upgrade</a></li>
 			<li><a href="https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1988119">Widespread outage was caused on Azure, when systemd 237-3ubuntu10.54 was published to the bionic-security pocket (instances could no longer resolve DNS queries, breaking networking)</a></li>
 			<li><a href="https://github.com/systemd/systemd/issues/437">#437: timeX.google.com provide non standard time</a></li>
 			<li><a href="https://github.com/systemd/systemd/issues/1143">#1143: PID1 getting stuck printing "systemd[1]: Time has been changed" continuously</a></li>