build(deps): bump org.eclipse.jetty.websocket:websocket-jakarta-server

Bumps org.eclipse.jetty.websocket:websocket-jakarta-server from 11.0.15 to 11.0.20.

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

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

gradle/libs.versions.toml

@@ -17,7 +17,7 @@ jakarta-transaction = "2.0.1"
 jackson = "2.15.2"
 jersey = "3.1.2"
 jetbrainsAnnotation = "24.0.1"
-jetty = "11.0.15"
+jetty = "11.0.20"
 jetty-jakarta-servlet-api = "5.0.2"
 json-unit = "3.0.0"
 junit-pioneer = "2.0.1"