fixed the Cohere example title (#3053)

- fixed the Cohere example title (bug in #3041, sorry for it)
- fixed the runhouse.ipynb file name inconsistency

docs/modules/models/llms/integrations/cohere.ipynb

@@ -5,11 +5,11 @@
    "id": "9597802c",
    "metadata": {},
    "source": [
-    "# Install the package\n",
+    "# Cohere\n",
     "\n",
     "[Cohere](https://cohere.ai/about) is a Canadian startup that provides natural language processing models that help companies improve human-machine interactions.\n",
     "\n",
-    "This example goes over how to use LangChain to interact with Cohere models"
+    "This example goes over how to use LangChain to interact with `Cohere` [models](https://docs.cohere.ai/docs/generation-card)."
    ]
   },
   {