Fix: align ollama defaults with docs

Author: Muneer320

README.md

@@ -174,19 +174,19 @@ This makes it easy to tweak the tone, iterate on suggestions, or fine-tune the f
   commit llm update
 ```
 
-**Set LLM as default**
+### Set LLM as default
 
 ```bash
 Select: Set Default
 ```
 
-**Change API Key**
+### Change API Key
 
 ```bash
 Select: Change API Key
 ```
 
-**Delete LLM**
+### Delete LLM
 
 ```bash
 Select: Delete

cmd/cli/createMsg.go

@@ -247,7 +247,7 @@ func generateMessage(provider types.LLMProvider, config *types.Config, changes s
 		}
 		model := os.Getenv("OLLAMA_MODEL")
 		if model == "" {
-			model = "llama3:latest"
+			model = "llama3.1"
 		}
 		return ollama.GenerateCommitMessage(config, changes, url, model, opts)
 	default: