Bump jetty-server from 9.3.0.M1 to 9.4.51.v20230217 in /riskified-sample

Bumps [jetty-server](https://github.com/eclipse/jetty.project) from 9.3.0.M1 to 9.4.51.v20230217.
- [Release notes](https://github.com/eclipse/jetty.project/releases)
- [Commits](jetty/jetty.project@jetty-9.3.0.M1...jetty-9.4.51.v20230217)

---
updated-dependencies:
- dependency-name: org.eclipse.jetty:jetty-server
  dependency-type: direct:production
...

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

riskified-sample/pom.xml

@@ -21,7 +21,7 @@
         <dependency>
             <groupId>org.eclipse.jetty</groupId>
             <artifactId>jetty-server</artifactId>
-            <version>9.3.0.M1</version>
+            <version>9.4.51.v20230217</version>
         </dependency>
 
         <dependency>