fix: Gemini 1.5 name error

relay/channel/gemini/adaptor.go

@@ -20,7 +20,7 @@ func (a *Adaptor) Init(info *relaycommon.RelayInfo, request dto.GeneralOpenAIReq
 
 // 定义一个映射，存储模型名称和对应的版本
 var modelVersionMap = map[string]string{
-    "gemini-1.5-pro": "v1beta",
+    "gemini-1.5-pro-latest": "v1beta",
     "gemini-ultra":   "v1beta",
 }