Update docs.

docs/en/setup/service-agent/java-agent/Java-Agent-self-observability.md → docs/en/setup/service-agent/java-agent/Agent-self-observability.md

@@ -1,9 +1,11 @@
-# Java Agent self-observability
+# Agent self-observability
 The Java Agent self-observability feature is built-in and used to measure the tracing performance and error statistics of plugins.
 
 It reports meters to SkyWalking oap through native meter protocol, OAP receives and analyzes meters, 
 which are ultimately presented on the [Java Agent self-observability dashboard](https://skywalking.apache.org/docs/main/next/en/setup/backend/dashboards-so11y-java-agent/).
 
+***Note: Java Agent self-observability dashboard is available since OAP 10.1.0***
+
 # Details of agent so11y meters
 - `created_tracing_context_counter` - Counter. The number of created tracing contexts. This includes a label=created_by(value=sampler,propagated). `created_by=propagated` means the agent created the context due to downstream service added sw8 header to trigger force sampling. `created_by=sampler` means the agent created this context by local sampler no matter which policy it uses.
 - `finished_tracing_context_counter` - Counter. The number of created contexts. The gap between `finished_tracing_context_counter` and `created_tracing_context_counter` should be relatively stable, otherwise, the memory cost would be increased.

docs/en/setup/service-agent/java-agent/Plugin-test.md

@@ -107,7 +107,7 @@ File Name | Descriptions
 | startScript | Path of the start up script. Required in `type: jvm` only.
 | runningMode | Running mode with the optional plugin, options, `default`(default), `with_optional`, or `with_bootstrap`.
 | withPlugins | Plugin selector rule, e.g.:`apm-spring-annotation-plugin-*.jar`. Required for `runningMode=with_optional` or `runningMode=with_bootstrap`.
-| environment | Same as `docker-compose#environment`.
+| environment | Same as `docker-compose#environment` and also used as `docker run` environment variables.
 | depends_on | Same as `docker-compose#depends_on`.
 | dependencies | Same as `docker-compose#services`, `image`, `links`, `hostname`, `command`, `environment` and `depends_on` are supported.
 

docs/menu.yml

@@ -89,7 +89,9 @@ catalog:
       - name: "Advanced reporters"
         path: "/en/setup/service-agent/java-agent/advanced-reporters"
       - name: "Agent Self Observability"
-        path: "/en/setup/service-agent/java-agent/Java-Agent-self-observability"
+        path: "/en/setup/service-agent/java-agent/Agent-self-observability"
+      - name: "Plugin Test Guide"
+        path: "/en/setup/service-agent/java-agent/Plugin-test/"
       - name: "Plugin Development Guide"
         path: "/en/setup/service-agent/java-agent/java-plugin-development-guide/"
       - name: "Java Agent Performance Test"