refactor: add stacklevel=2 to jm_log compatibility warning

Author: hect0x7

src/jmcomic/jm_config.py

@@ -422,7 +422,10 @@ def jm_log(cls, topic: str, msg: str, e: Exception = None):
                     executor(topic, msg, e)
                 else:
                     import warnings
-                    warnings.warn('jmcomic已升级到标准logging，建议将EXECUTOR_LOG重新定义为3个参数以接收异常对象 (topic, msg, e)')
+                    warnings.warn(
+                        'jmcomic已升级到标准logging，建议将EXECUTOR_LOG重新定义为3个参数以接收异常对象 (topic, msg, e)',
+                        stacklevel=2
+                    )
                     executor(topic, msg)
 
     @classmethod