[4.0.x] Bump jetty-version from 12.0.31 to 12.1.5

Bumps `jetty-version` from 12.0.31 to 12.1.5.

Updates `org.eclipse.jetty:jetty-client` from 12.0.31 to 12.1.5

Updates `org.eclipse.jetty:jetty-server` from 12.0.31 to 12.1.5

Updates `org.eclipse.jetty:jetty-slf4j-impl` from 12.0.31 to 12.1.5

Updates `org.eclipse.jetty.http2:jetty-http2-client-transport` from 12.0.31 to 12.1.5

Updates `org.eclipse.jetty.http2:jetty-http2-server` from 12.0.31 to 12.1.5

---
updated-dependencies:
- dependency-name: org.eclipse.jetty:jetty-client
  dependency-version: 12.1.5
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.eclipse.jetty:jetty-server
  dependency-version: 12.1.5
  dependency-type: direct:development
  update-type: version-update:semver-minor
- dependency-name: org.eclipse.jetty:jetty-slf4j-impl
  dependency-version: 12.1.5
  dependency-type: direct:development
  update-type: version-update:semver-minor
- dependency-name: org.eclipse.jetty.http2:jetty-http2-client-transport
  dependency-version: 12.1.5
  dependency-type: direct:development
  update-type: version-update:semver-minor
- dependency-name: org.eclipse.jetty.http2:jetty-http2-server
  dependency-version: 12.1.5
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -56,7 +56,7 @@
   </distributionManagement>
 
   <properties>
-    <jetty-version>12.0.31</jetty-version>
+    <jetty-version>12.1.5</jetty-version>
     <njord.autoPublish>true</njord.autoPublish>
     <njord.version>0.8.7</njord.version>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>