• I have searched the issues of this repository and believe that this is not a duplicate.
• I have checked the FAQ of this repository and believe that this is not a duplicate.

environment

• canal version
  v1.1.17
• mysql version
  8.0.29

Issue Description

当源库的json字符插入类似如下这种key包含特殊字符的数据时：
{"key1": {"(.)(/[^/]+\.(mp|MP)4)$": "value1"}}
这个值的key包括\转义符，解析出来的值会变成：
{"key1": {"(.)(/[^/]+.(mp|MP)4)$": "value1"}}
这少了一个转义符\，导致插入目标库报错
nested exception is com.mysql.cj.jdbc.exceptions.MysqlDataTruncation: Data truncation: Invalid JSON text: "Invalid escape character in string." at position XX in value for column

Steps to reproduce

Expected behaviour

{"key1": {"(.*)(/[^/]+\.(mp|MP)4)$": "value1"}}

Actual behaviour

{"key1": {"(.*)(/[^/]+.(mp|MP)4)$": "value1"}}

If there is an exception, please attach the exception trace:

Just put your stack trace here!