Bump geoserver.version from 2.28.2 to 2.28.3 in /geoserver/maven (#125)

Bumps `geoserver.version` from 2.28.2 to 2.28.3.

Updates `org.geoserver.web:gs-web-app` from 2.28.2 to 2.28.3

Updates `org.geoserver.extension:gs-oracle` from 2.28.2 to 2.28.3

Updates `org.geoserver.extension:gs-sqlserver` from 2.28.2 to 2.28.3

Updates `org.geoserver.extension:gs-css` from 2.28.2 to 2.28.3

Updates `org.geoserver.extension:gs-geopkg-output-wfs` from 2.28.2 to 2.28.3

Updates `org.geoserver.extension:gs-excel-wfs` from 2.28.2 to 2.28.3

Updates `org.geoserver.extension:gs-dxf-core` from 2.28.2 to 2.28.3

Updates `org.geoserver.extension:gs-web-resource` from 2.28.2 to 2.28.3

Updates `org.geoserver.extension:gs-web-features` from 2.28.2 to 2.28.3

---
updated-dependencies:
- dependency-name: org.geoserver.web:gs-web-app
  dependency-version: 2.28.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.geoserver.extension:gs-oracle
  dependency-version: 2.28.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.geoserver.extension:gs-sqlserver
  dependency-version: 2.28.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.geoserver.extension:gs-css
  dependency-version: 2.28.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.geoserver.extension:gs-geopkg-output-wfs
  dependency-version: 2.28.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.geoserver.extension:gs-excel-wfs
  dependency-version: 2.28.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.geoserver.extension:gs-dxf-core
  dependency-version: 2.28.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.geoserver.extension:gs-web-resource
  dependency-version: 2.28.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.geoserver.extension:gs-web-features
  dependency-version: 2.28.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

geoserver/maven/pom.xml

@@ -9,7 +9,7 @@
     <name>Tailormap Data Geoserver</name>
     <description>WAR-overlay project with custom GeoServer for Tailormap test and demo</description>
     <properties>
-        <geoserver.version>${project.version}</geoserver.version>
+        <geoserver.version>2.28.3</geoserver.version>
     </properties>
     <url>https://github.com/Tailormap/tailormap-data</url>
     <organization>