Bump org.apache.logging.log4j:log4j-api from 2.20.0 to 2.21.0

Bumps org.apache.logging.log4j:log4j-api from 2.20.0 to 2.21.0.

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

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

build.gradle

@@ -20,7 +20,7 @@ repositories {
 }
 
 dependencies {
-    implementation 'org.apache.logging.log4j:log4j-api:2.20.0'
+    implementation 'org.apache.logging.log4j:log4j-api:2.21.0'
     implementation 'io.netty:netty-codec:4.1.99.Final'
     implementation 'jakarta.xml.bind:jakarta.xml.bind-api:4.0.1'