Update org.hdrhistogram:HdrHistogram to version 2.2.1 (#2568)

Author: asf-rm

log4j-parent/pom.xml

@@ -117,7 +117,7 @@
     <h2.version>2.2.222</h2.version>
     <hadoop.version>1.2.1</hadoop.version>
     <hamcrest.version>2.2</hamcrest.version>
-    <HdrHistogram.version>2.1.12</HdrHistogram.version>
+    <HdrHistogram.version>2.2.1</HdrHistogram.version>
     <hsqldb.version>2.7.2</hsqldb.version>
     <jackson-bom.version>2.17.0</jackson-bom.version>
     <jansi.version>2.4.0</jansi.version>

src/changelog/.3.x.x/update_org_hdrhistogram_hdrhistogram.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="2568" link="https://github.com/apache/logging-log4j2/pull/2568"/>
+  <description format="asciidoc">Update `org.hdrhistogram:HdrHistogram` to version `2.2.1`</description>
+</entry>