Bump org.eclipse.jetty:jetty-server in /geowebcache

Bumps org.eclipse.jetty:jetty-server from 12.0.28 to 12.0.32.

---
updated-dependencies:
- dependency-name: org.eclipse.jetty:jetty-server
  dependency-version: 12.0.32
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

geowebcache/pom.xml

@@ -70,7 +70,7 @@
     <spotless.apply.skip>false</spotless.apply.skip>
     <pom.fmt.action>sort</pom.fmt.action>
     <pom.fmt.skip>${spotless.apply.skip}</pom.fmt.skip>
-    <jetty.version>12.0.28</jetty.version>
+    <jetty.version>12.0.32</jetty.version>
     <errorProneFlags></errorProneFlags>
     <errorProne.version>2.31.0</errorProne.version>
     <javac.version>9+181-r4173-1</javac.version>