Update com.gradle:develocity-maven-extension to version 1.21.4 (#2642)

Author: asf-rm

.mvn/extensions.xml

@@ -3,7 +3,7 @@
     <extension>
         <groupId>com.gradle</groupId>
         <artifactId>develocity-maven-extension</artifactId>
-        <version>1.21.3</version>
+        <version>1.21.4</version>
     </extension>
     <extension>
         <groupId>com.gradle</groupId>

src/changelog/.2.x.x/update_com_gradle_develocity_maven_extension.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="2642" link="https://github.com/apache/logging-log4j2/pull/2642"/>
+  <description format="asciidoc">Update `com.gradle:develocity-maven-extension` to version `1.21.4`</description>
+</entry>