Fix Javadoc warnings on Java 23

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Author: garydgregory

src/changes/changes.xml

@@ -51,6 +51,7 @@
       <action type="fix" dev="ggregory" due-to="Dávid Szigecsán">Fix documentation for CSVFormat private constructor #466.</action>
       <action type="fix" issue="CSV-294" dev="ggregory" due-to="Joern Huxhorn, Gary Gregory">CSVFormat does not support explicit " as escape char.</action>
       <action type="fix" issue="CSV-150" dev="ggregory" due-to="dota17, Gary Gregory, Jörn Huxhorn">Escaping is not disableable.</action>
+      <action type="fix" dev="ggregory" due-to="Gary Gregory">Fix Javadoc warnings on Java 23.</action>      
       <!-- UPDATE -->
       <action type="update" dev="ggregory" due-to="Dependabot">Bump commons-codec:commons-codec from 1.16.1 to 1.17.1 #422, #449.</action>
       <action type="update" dev="ggregory" due-to="Gary Gregory">Bump org.apache.commons:commons-parent from 69 to 75 #435, #452, #465, #468, #475.</action>