Bump slf4j.version from 2.0.17 to 2.0.18 (#644).

Author: garydgregory

src/changes/changes.xml

@@ -31,6 +31,7 @@
       <action type="update" dev="ggregory" due-to="Gary Gregory, Dependabot">Bump com.fasterxml.jackson.core:jackson-databind from 2.21.3 to 2.22.0 (#641).</action>
       <action type="update" dev="ggregory" due-to="Gary Gregory">Bump commons-logging:commons-logging from 1.3.6 to 1.4.0.</action>
       <action type="update" dev="ggregory" due-to="Gary Gregory">Bump org.dbunit:dbunit from 3.0.0 to 3.2.0 (#643).</action>
+      <action type="update" dev="ggregory" due-to="Gary Gregory">Bump slf4j.version from 2.0.17 to 2.0.18 (#644).</action>
     </release>
     <release version="2.15.1" date="2026-05-21" description="This is a feature and maintenance release. Java 8 or later is required.">
       <!-- FIX -->