Bump pagehelper from 5.1.11 to 5.3.1

Bumps [pagehelper](https://github.com/pagehelper/Mybatis-PageHelper) from 5.1.11 to 5.3.1.
- [Release notes](https://github.com/pagehelper/Mybatis-PageHelper/releases)
- [Commits](https://github.com/pagehelper/Mybatis-PageHelper/compare/v5.1.11...v5.3.1)

---
updated-dependencies:
- dependency-name: com.github.pagehelper:pagehelper
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

mybatis-plus-extension/build.gradle

@@ -16,6 +16,6 @@ dependencies {
     implementation "${lib['mybatis-thymeleaf']}"
     implementation "${lib.'mybatis-velocity'}"
     implementation "${lib.'mybatis-freemarker'}"
-    testImplementation "com.github.pagehelper:pagehelper:5.1.11"
+    testImplementation "com.github.pagehelper:pagehelper:5.3.1"
     testImplementation "com.google.guava:guava:31.1-jre"
 }