Fix Javadoc generation on Java 8, 17, and 21

Author: garydgregory

src/changes/changes.xml

@@ -34,6 +34,7 @@
       <action type="fix" dev="ggregory" due-to="Gary Gregory">Replace internal use of Locale.ENGLISH with Locale.ROOT.</action>
       <action type="fix" dev="ggregory" due-to="Gary Gregory">Replace Maven CLIRR plugin with JApiCmp.</action>
       <action type="fix" dev="ggregory" due-to="Gary Gregory">Port to Java 1.4 Throwable APIs (!).</action>
+      <action type="fix" dev="ggregory" due-to="Gary Gregory">Fix Javadoc generation on Java 8, 17, and 21.</action>
       <!-- UPDATE -->
       <action dev="ggregory" type="update" due-to="Gary Gregory">Bump org.apache.commons:commons-parent from 47 to 78.</action>
       <action dev="ggregory" type="update" due-to="Gary Gregory">Bump Java requirement from Java 6 to 8.</action>