fix(deps): update geoserver.version to v2.28.0

Author: renovate[bot]

pom.xml

@@ -35,7 +35,7 @@
   </distributionManagement>
 
   <properties>
-    <geoserver.version>2.27.2</geoserver.version>
+    <geoserver.version>2.28.0</geoserver.version>
   </properties>
 
   <dependencyManagement>