chore(deps): bump log4j from 2.19.0 to 2.25.3

Bumps `log4j` from 2.19.0 to 2.25.3.

Updates `org.apache.logging.log4j:log4j-api` from 2.19.0 to 2.25.3

Updates `org.apache.logging.log4j:log4j-core` from 2.19.0 to 2.25.3

Updates `org.apache.logging.log4j:log4j-slf4j2-impl` from 2.19.0 to 2.25.3

---
updated-dependencies:
- dependency-name: org.apache.logging.log4j:log4j-api
  dependency-version: 2.25.3
  dependency-type: direct:production
- dependency-name: org.apache.logging.log4j:log4j-core
  dependency-version: 2.25.3
  dependency-type: direct:production
- dependency-name: org.apache.logging.log4j:log4j-slf4j2-impl
  dependency-version: 2.25.3
  dependency-type: direct:production
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -11,7 +11,7 @@ gradle-git-properties = "2.4.1"
 javalin = "5.4.2"
 jte = "2.2.3"
 flexmark = "0.64.0"
-log4j = "2.19.0"
+log4j = "2.25.3"
 jackson = "2.14.1"
 junit = "5.9.0"
 jwt = "4.2.1"