Bump log4j2.version from 2.20.0 to 2.21.1 (#61)

Bumps `log4j2.version` from 2.20.0 to 2.21.1.

Updates `org.apache.logging.log4j:log4j-api` from 2.20.0 to 2.21.1

Updates `org.apache.logging.log4j:log4j-core` from 2.20.0 to 2.21.1

Updates `org.apache.logging.log4j:log4j-slf4j2-impl` from 2.20.0 to 2.21.1

---
updated-dependencies:
- dependency-name: org.apache.logging.log4j:log4j-api
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.apache.logging.log4j:log4j-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.apache.logging.log4j:log4j-slf4j2-impl
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pom.xml

@@ -12,7 +12,7 @@
         <maven.compiler.target>17</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <junit.jupiter.version>5.10.0</junit.jupiter.version>
-        <log4j2.version>2.20.0</log4j2.version>
+        <log4j2.version>2.21.1</log4j2.version>
         <jackson.version>2.15.2</jackson.version>
         <jline.version>3.24.1</jline.version>
         <!-- 本地测试服务端插件目录 -->