message: docs: reference usePluginContext hook
diff: @@ -127,7 +127,7 @@ Here is a list of all public class methods that existed in `graphiql@1` and its
  There are a couple more class methods that were intended to be private and were already removed starting in `graphiql@1.9.0`. Since they were not actually marked with `private`, here's an extension to the above list for these methods:
  -- `handleClickReference`: This was a callback method triggered when clicking on a type or field. It would open the doc explorer for the clicked reference. If you want to manually mimic this behavior you can use the `push` method from the `ExplorerContext` to add an item to the navigation stack of the doc explorer, and you can use the `setVisiblePlugin` method of the `PluginContext` to show the doc explorer plugin (by passing the `DOC_EXPLORER_PLUGIN` object provided by `@graphiql/react`).
  +- `handleClickReference`: This was a callback method triggered when clicking on a type or field. It would open the doc explorer for the clicked reference. If you want to manually mimic this behavior you can use the `push` method from the `ExplorerContext` to add an item to the navigation stack of the doc explorer, and you can use the `setVisiblePlugin` method of the `PluginContext` (use the `usePluginContext()` hook to access this) to show the doc explorer plugin (by passing the `DOC_EXPLORER_PLUGIN` object provided by `@graphiql/react`).
  - `handleRunQuery`: To execute a query, use the `run` method of the `ExecutionContext`. If you want to explicitly set an operation name, call the `setOperationName` method of the `EditorContext` provider before that (passing in the operation name string as argument).
  - `handleEditorRunQuery`: Use the `run` method of the `ExecutionContext`.
  - `handleStopQuery`: Use the `stop` method from the `ExecutionContext`.
  