Adding in the new MQTT docs

jeremypoulter · jeremypoulter · commit 4a69539d2ac0 · 2022-08-10T12:09:49.000+01:00
diff --git a/toc.json b/toc.json
@@ -29,6 +29,11 @@
       "title": "OpenEVSE WiFi API",
       "uri": "api.yml"
     },
+    {
+      "type": "item",
+      "title": "MQTT API",
+      "uri": "docs/mqtt.md"
+    },
     {
       "type": "item",
       "title": "RAPI API",
