update doc

Author: skywind3000

README.md

@@ -19,7 +19,7 @@ let g:gpt_commit_key = 'Your openai apikey'
 " uncomment this line below to enable proxy
 " let g:gpt_commit_proxy = 'socks5://127.0.0.1:1080'
 
-" uncomment the following lines to use Ollama:
+" uncomment the following lines if you want to use Ollama:
 " let g:gpt_commit_engine = 'ollama'
 " let g:gpt_commit_ollama_url = 'http://127.0.0.1:11434/api/chat'
 " let g:gpt_commit_ollama_model = 'llama2'
@@ -37,7 +37,7 @@ For lazy:
         -- uncomment this line below to enable proxy
         -- vim.g.gpt_commit_proxy = 'socks5://127.0.0.1:1080'
 
-        -- uncomment the following lines to use Ollama:
+        -- uncomment the following lines if you want to use Ollama:
         -- vim.g.gpt_commit_engine = 'ollama'
         -- vim.g.gpt_commit_ollama_url = 'http://127.0.0.1:11434/api/chat'
         -- vim.g.gpt_commit_ollama_model = 'llama2'