fix(sec): upgrading jetty version to 9.4.51.v20230217

[bowika]

Fixing CVE, this version can be pulled with jitpack.

[bowika]

I have just now put a commit on top for fixing further ones. Until it is merged, it may use it via jitpack with
eg. pom.xml:

        <dependency>
            <groupId>com.github.bowika</groupId>
            <artifactId>spark</artifactId>
            <version>40e9a4fc7e</version>
        </dependency>