Changelog for additional fixes

Author: ppkarwasz

…event_warning_for_last_null_argument.xml …event_warning_for_last_null_argument.xmlsrc/changelog/.2.x.x/3975_prevent_warning_for_last_null_argument.xml renamed to src/changelog/2.25.4/3975_prevent_warning_for_last_null_argument.xml src/changelog/.2.x.x/3975_prevent_warning_for_last_null_argument.xml renamed to src/changelog/2.25.4/3975_prevent_warning_for_last_null_argument.xml

@@ -4,7 +4,7 @@
        xsi:schemaLocation="
            https://logging.apache.org/xml/ns
            https://logging.apache.org/xml/ns/log4j-changelog-0.xsd"
-       type="changed">
+       type="fixed">
     <issue id="3975" link="https://github.com/apache/logging-log4j2/issues/3975"/>
     <issue id="4014" link="https://github.com/apache/logging-log4j2/pull/4014"/>
     <description format="asciidoc">

…x/4033_fix_custom_throwable_to_sting.xml …4/4033_fix_custom_throwable_to_sting.xmlsrc/changelog/.2.x.x/4033_fix_custom_throwable_to_sting.xml renamed to src/changelog/2.25.4/4033_fix_custom_throwable_to_sting.xml src/changelog/.2.x.x/4033_fix_custom_throwable_to_sting.xml renamed to src/changelog/2.25.4/4033_fix_custom_throwable_to_sting.xml

@@ -4,7 +4,7 @@
        xsi:schemaLocation="
            https://logging.apache.org/xml/ns
            https://logging.apache.org/xml/ns/log4j-changelog-0.xsd"
-       type="changed">
+       type="fixed">
     <issue id="3623" link="https://github.com/apache/logging-log4j2/issues/3623"/>
     <issue id="4033" link="https://github.com/apache/logging-log4j2/pull/4033"/>
     <description format="asciidoc">