add tinychat option for llama-3.1-70b-bf16

tinychat/examples/tinychat/index.html

@@ -29,6 +29,7 @@
 <select @change="if (cstate) cstate.selectedModel = $event.target.value" x-model="cstate.selectedModel">
 <option selected="" value="llama-3.1-8b">Llama 3.1 8B</option>
 <option value="llama-3.1-70b">Llama 3.1 70B</option>
+<option value="llama-3.1-70b-bf16">Llama 3.1 70B (BF16)</option>
 <option value="llama-3.1-405b">Llama 3.1 405B</option>
 <option value="llama-3-8b">Llama 3 8B</option>
 <option value="llama-3-70b">Llama 3 70B</option>