Inaccurate description of pathPattern configuration

In the PR https://github.com/halo-sigs/plugin-lightgallery/pull/6, we have supported image zooming based on page rules, but the description of `pathPattern` below is not accurate.

```txt
用于匹配页面路径的正则表达式，如：/archives/**
```

On the contrary, the rule is based on [PathPattern](https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/web/util/pattern/PathPattern.html) instead of Regex. Thereforce, I request a clearer description of the configuration.

/kind improvement

Locate the configuration documentation for `pathPattern` and compare its wording with the linked PathPattern reference. Update the description so it accurately identifies the matching rule rather than calling it a regular expression, then verify that the example remains consistent with the documented behavior.

Written by the indexing model from the issue text.