Bump org.apache.groovy:groovy-bom from 4.0.25 to 4.0.26 in /log4j-parent

Bumps [org.apache.groovy:groovy-bom](https://github.com/apache/groovy) from 4.0.25 to 4.0.26.
- [Commits](https://github.com/apache/groovy/commits)

---
updated-dependencies:
- dependency-name: org.apache.groovy:groovy-bom
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

log4j-parent/pom.xml

@@ -81,7 +81,7 @@
     <disruptor.version>3.4.4</disruptor.version>
     <embedded-ldap.version>0.9.0</embedded-ldap.version>
     <felix.version>7.0.5</felix.version>
-    <groovy.version>4.0.25</groovy.version>
+    <groovy.version>4.0.26</groovy.version>
     <guava.version>33.4.0-jre</guava.version>
     <h2.version>2.2.224</h2.version>
     <hamcrest.version>3.0</hamcrest.version>