Add link to leios-design.pdf in website

Author: ch1bo

site/sidebars.ts

@@ -21,14 +21,19 @@ const sidebars: SidebarsConfig = {
         "development/throughput-simulation",
         "development/simulation-demonstration",
         "development/cost-estimator",
-        "development/monthly-reviews",
         {
           type: "link",
           href: "https://leios.cardano-scaling.org/visualizer",
           label: "Visualizer",
         },
       ],
     },
+    "development/monthly-reviews",
+    {
+      type: "link",
+      href: "https://leios.cardano-scaling.org/leios-design.pdf",
+      label: "Technical Design",
+    },
   ],
 };