Change ollama for cody chat header to match autocomplete (#757)

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Author: enriquegh

docs/cody/clients/install-vscode.mdx

@@ -335,7 +335,7 @@ To get autocomplete suggestions from Ollama locally, follow these steps:
 
 - Confirm Cody uses Ollama by looking at the Cody output channel or the autocomplete trace view (in the command palette)
 
-#### Cody Chat and Commands with Ollama
+### Cody Chat and Commands with Ollama
 
 <img
   src="https://storage.googleapis.com/sourcegraph-assets/blog/cody-vscode-1.8.0/localollama.png"