Revert "Bump org.apache.commons:commons-parent from 92 to 93 apache#416"

This reverts commit 8d35bd2.

Author: garydgregory

src/changes/changes.xml

@@ -35,7 +35,7 @@
       <!-- ADD -->
       <action type="add" dev="ggregory" due-to="David Larochette, Gary Gregory">Add CommandLine.getOptionCount() to measure option repetition #396.</action>
       <!-- UPDATE -->
-      <action type="update" dev="ggregory" due-to="Gary Gregory, Dependabot">Bump org.apache.commons:commons-parent from 85 to 93 #393, #416.</action>
+      <action type="update" dev="ggregory" due-to="Gary Gregory, Dependabot">Bump org.apache.commons:commons-parent from 85 to 91 #393.</action>
       <action type="update" dev="ggregory" due-to="Gary Gregory">Bump commons-io:commons-io from 2.20.0 to 2.21.0.</action>
     </release>
     <release version="1.10.0" date="2025-07-30" description="This is a feature and maintenance release. Java 8 or later is required.">