fix: add copilot-instructions.md to .gitignore

Author: liuruibin

.gitignore

@@ -189,4 +189,5 @@ apps/models_provider/impl/tencent_model_provider/credential/stt.py
 apps/models_provider/impl/tencent_model_provider/model/stt.py
 tmp/
 config.yml
-.SANDBOX_BANNED_HOSTS
+.SANDBOX_BANNED_HOSTS
+copilot-instructions.md