Update vercel.json (again)

vercel.json

@@ -21,9 +21,14 @@
       "destination": "/link/",
       "permanent": true
     },
+    {
+      "source": "/writing/2018/compile-nginx-tls1.3/",
+      "destination": "/writing/2018/compile-nginx-tls1_3/",
+      "permanent": true
+    },
     {
       "source": "/writing/2018/compile-nginx-tls1.3",
-      "destination": "/writing/2018/compile-nginx-tls1.3/",
+      "destination": "/writing/2018/compile-nginx-tls1_3/",
       "permanent": true
     }
   ]