fix html no gpt-4o-mini

Author: xiaozhou26

web/index.html

@@ -2477,6 +2477,7 @@
                             <label for="preSetModel" data-i18n-key="gptModel"></label>
                             <select id="preSetModel">
                                 <option value="gpt-3.5-turbo-0125">gpt-3.5-turbo-0125</option>
+                                <option value="gpt-4o-mini">gpt-4o-mini</option>
                                 <option value="claude-3-haiku-20240307">claude-3-haiku-20240307</option>
                                 <option value="llama-3-70b">llama-3-70b</option>
                                 <option value="mixtral-8x7b">mixtral-8x7b</option>