Add Dynadot referral link

docs/promolinks.md

@@ -11,6 +11,17 @@
 Receive $200 in cloud credit to test their products for 60 days.<br>
 <a href="https://m.do.co/c/4248d53011c8">Register Now</a>
 
+<h2 id="dynadot">
+    <picture>
+        <source media="(prefers-color-scheme: dark)" srcset="../assets/icons/dynadot-light.svg">
+        <img src="../assets/icons/dynadot.svg" width="25px" height="25px">
+    </picture>
+    Dynadot
+</h2>
+
+Receive 4,5€ in account credit.<br>
+<a href="https://dynadot.com?sM7K8u7m6Z7pBo">Register Now</a>
+
 <h2 id="hetzner">
     <picture>
         <source media="(prefers-color-scheme: dark)" srcset="../assets/icons/hetzner-light.svg">