fix: 补充硅基流动的 env 环境变量

.env.template

@@ -73,6 +73,11 @@ ANTHROPIC_API_VERSION=
 ### anthropic claude Api url (optional)
 ANTHROPIC_URL=
 
-
 ### (optional)
 WHITE_WEBDAV_ENDPOINTS=
+
+### siliconflow Api key (optional)
+SILICONFLOW_API_KEY=
+
+### siliconflow Api url (optional)
+SILICONFLOW_URL=