Update org.assertj:assertj-core to version 3.26.0 (#2617)

Author: asf-rm

log4j-parent/pom.xml

@@ -93,7 +93,7 @@
     <!-- =====================================================
          Direct dependency version properties (in alphabetical order)
          ===================================================== -->
-    <assertj.version>3.25.3</assertj.version>
+    <assertj.version>3.26.0</assertj.version>
     <awaitility.version>4.2.1</awaitility.version>
     <bsh.version>2.0b6</bsh.version>
     <commons-codec.version>1.17.0</commons-codec.version>

src/changelog/.3.x.x/update_org_assertj_assertj_core.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<entry xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xmlns="https://logging.apache.org/xml/ns"
+       xsi:schemaLocation="https://logging.apache.org/xml/ns https://logging.apache.org/xml/ns/log4j-changelog-0.xsd"
+       type="updated">
+  <issue id="2617" link="https://github.com/apache/logging-log4j2/pull/2617"/>
+  <description format="asciidoc">Update `org.assertj:assertj-core` to version `3.26.0`</description>
+</entry>