doc: include node.module_timer on available categories · nodejs/node@758178b

nodejs

Original file line number	Diff line number	Diff line change
`@@ -46,6 +46,7 @@ The available categories are:`
`46`	`46`	`runInNewContext()`, `runInContext()`, and `runInThisContext()` methods.
`47`	`47`	* `v8`: The [V8][] events are GC, compiling, and execution related.
`48`	`48`	* `node.http`: Enables capture of trace data for http request / response.
	`49`	+* `node.module_timer`: Enables capture of trace data for CJS Module loading.
`49`	`50`
`50`	`51`	By default the `node`, `node.async_hooks`, and `v8` categories are enabled.
`51`	`52`