Update Java 17 changelog entry

The migration to a JDK 17 build is similar to any other dependency
update (e.g. Github Actions or Maven Plugin update). It **should** not
have an influence on the user.

Author: ppkarwasz

src/changelog/.2.x.x/java_17.xml

@@ -18,7 +18,7 @@
 <entry xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns="http://logging.apache.org/log4j/changelog"
        xsi:schemaLocation="http://logging.apache.org/log4j/changelog https://logging.apache.org/log4j/changelog-0.1.2.xsd"
-       type="changed">
+       type="updated">
   <issue id="2021" link="https://github.com/apache/logging-log4j2/issues/2021"/>
   <description format="asciidoc">
     Bumped the minimum Java version required for the build to Java 17. Runtime requirements remain unchanged.