Bump org.eclipse.jetty:jetty-server in /src/it/simple

Bumps org.eclipse.jetty:jetty-server from 12.0.12 to 12.0.13.

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

Signed-off-by: dependabot[bot] <support@github.com>

src/it/simple/pom.xml

@@ -49,7 +49,7 @@
         <dependency>
             <groupId>org.eclipse.jetty</groupId>
             <artifactId>jetty-server</artifactId>
-            <version>12.0.12</version>
+            <version>12.0.13</version>
             <scope>test</scope>
         </dependency>
         <dependency>