adding coauthor

recipes/use_cases/chatbots/sales_bot/SalesBot.ipynb

@@ -638,8 +638,9 @@
    "id": "6d4e65fe-0246-40b7-adb6-9091cccbc486",
    "metadata": {},
    "source": [
-    "**Author**\n",
-    "- Thierry Moreau, OctoAI - tmoreau@octo.ai"
+    "**Authors**\n",
+    "- Thierry Moreau, OctoAI - tmoreau@octo.ai\n",
+    "- Jonathan Tuite, Weaviate - jon@weaviate.io"
    ]
   }
  ],