Bump log4j2-version from 2.20.0 to 2.21.0

Bumps `log4j2-version` from 2.20.0 to 2.21.0.

Updates `org.apache.logging.log4j:log4j-core` from 2.20.0 to 2.21.0

Updates `org.apache.logging.log4j:log4j-slf4j2-impl` from 2.20.0 to 2.21.0

Updates `org.apache.logging.log4j:log4j-web` from 2.20.0 to 2.21.0

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

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

pom.xml

@@ -61,7 +61,7 @@
     <!-- Last GraalVM version to support Java 8 -->
     <graalvm-version>21.3.2.1</graalvm-version>
     <slf4j-version>2.0.9</slf4j-version>
-    <log4j2-version>2.20.0</log4j2-version>
+    <log4j2-version>2.21.0</log4j2-version>
     <spring-version>5.3.30</spring-version>
     <spring-boot-version>2.7.16</spring-boot-version>
     <jackson-version>2.15.2</jackson-version>