Bump org.eclipse.jetty:jetty-servlet from 11.0.17 to 11.0.18

Bumps [org.eclipse.jetty:jetty-servlet](https://github.com/eclipse/jetty.project) from 11.0.17 to 11.0.18.
- [Release notes](https://github.com/eclipse/jetty.project/releases)
- [Commits](https://github.com/eclipse/jetty.project/compare/jetty-11.0.17...jetty-11.0.18)

---
updated-dependencies:
- dependency-name: org.eclipse.jetty:jetty-servlet
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

pom.xml

@@ -362,7 +362,7 @@
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <java.version>11</java.version>
     <jclouds.version>2.5.0</jclouds.version>
-    <jetty.version>11.0.17</jetty.version>
+    <jetty.version>11.0.18</jetty.version>
     <slf4j.version>2.0.9</slf4j.version>
     <shade.prefix>${project.groupId}.shaded</shade.prefix>
     <surefire.version>3.0.0</surefire.version>