Bump jetty.version from 11.0.19 to 11.0.20

[dependabot[bot]]

Bumps jetty.version from 11.0.19 to 11.0.20. Updates org.eclipse.jetty.websocket:websocket-jakarta-server from 11.0.19 to 11.0.20

Updates org.eclipse.jetty.websocket:websocket-jakarta-client from 11.0.19 to 11.0.20

Updates org.eclipse.jetty:jetty-slf4j-impl from 11.0.19 to 11.0.20

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