fix(deps): update dependency org.geoserver:community to v2.28.0

Author: renovate[bot]

pom.xml

@@ -5,7 +5,7 @@
   <parent>
     <groupId>org.geoserver</groupId>
     <artifactId>community</artifactId>
-    <version>2.27.2</version>
+    <version>2.28.0</version>
   </parent>
 
   <groupId>de.terrestris</groupId>