Document need for micrometer-jersey2 dependency to get Jersey metrics

Closes gh-18622

spring-boot-project/spring-boot-docs/src/main/asciidoc/production-ready-features.adoc

@@ -1713,7 +1713,7 @@ To customize the tags, provide a `@Bean` that implements `WebFluxTagsProvider`.
 
 [[production-ready-metrics-jersey-server]]
 ==== Jersey Server Metrics
-Auto-configuration enables the instrumentation of requests handled by the Jersey JAX-RS implementation.
+When Micrometer's `micrometer-jersey2` module is on the classpath, auto-configuration enables the instrumentation of requests handled by the Jersey JAX-RS implementation.
 When `management.metrics.web.server.auto-time-requests` is `true`, this instrumentation occurs for all requests.
 Alternatively, when set to `false`, you can enable instrumentation by adding `@Timed` to a request-handling method: