add fasthttp ext to docs

Author: dominicriordan

docs/sources/next/extensions/explore.md

@@ -115,6 +115,10 @@ Use the table to explore the many extensions. Questions? Feel free to join the d
         <h4>xk6-faker</h4>
         <p>Generate random fake data</p>
     </a>
+    <a href="https://github.com/domsolutions/xk6-fasthttp" target="_blank" class="nav-cards__item nav-cards__item--guide">
+        <h4>xk6-fasthttp</h4>
+        <p>Enable RPS increase & file streaming on HTTP/1.1 requests</p>
+    </a>
     <a href="https://github.com/avitalique/xk6-file" target="_blank" class="nav-cards__item nav-cards__item--guide">
         <h4>xk6-file</h4>
         <p>Write files</p>

docs/sources/v0.48.x/extensions/explore.md

@@ -115,6 +115,10 @@ Use the table to explore the many extensions. Questions? Feel free to join the d
         <h4>xk6-faker</h4>
         <p>Generate random fake data</p>
     </a>
+    <a href="https://github.com/domsolutions/xk6-fasthttp" target="_blank" class="nav-cards__item nav-cards__item--guide">
+        <h4>xk6-fasthttp</h4>
+        <p>Enable RPS increase & file streaming on HTTP/1.1 requests</p>
+    </a>
     <a href="https://github.com/avitalique/xk6-file" target="_blank" class="nav-cards__item nav-cards__item--guide">
         <h4>xk6-file</h4>
         <p>Write files</p>