fix: rename the latest Gemini model name

relay/channel/gemini/constant.go

@@ -5,8 +5,8 @@ const (
 )
 
 var ModelList = []string{
-	"gemini-pro", "gemini-1.0-pro-001", "gemini-1.5-pro", "gemini-ultra",
-	"gemini-pro-vision", "gemini-1.0-pro-vision-001",
+	"gemini-1.0-pro-latest", "gemini-1.0-pro-001", "gemini-1.5-pro-latest", "gemini-ultra",
+	"gemini-1.0-pro-vision-latest", "gemini-1.0-pro-vision-001",
 }
 
 var ChannelName = "google gemini"