doc: fix actual result of example is different in events

[deokjinkim]

Change of events internal may be not reflected yet.

In document, result of example is like below.

a b MyEmitter {
domain: null,
_events: { event: [Function] },
_eventsCount: 1,
_maxListeners: undefined } true

But actual result of example with current node is like below.

a b MyEmitter {
_events: [Object: null prototype] { event: [Function (anonymous)] },
_eventsCount: 1,
_maxListeners: undefined,
[Symbol(kCapture)]: false
} true

[bnb]

Just ran with the below code example (separately, we should probably update this specific code example to actually be runnable with the below code) and got the updated output.

constEventEmitter=require('node:events');classMyEmitterextendsEventEmitter{};constmyEmitter=newMyEmitter();myEmitter.on('event',function(a,b){console.log(a,b,this,this===myEmitter);});myEmitter.emit('event','a','b');

[daeyeon]

Nit: the commit message title needs to start with an imperative verb to meet the guideline below. This isn't a blocker since it could be fixed by someone when landing the PR. However, it can be fixed also by a force push.

node/doc/contributing/pull-requests.md

Lines 168 to 171 in a1c62cf

	* be prefixed with the name of the changed [subsystem](#appendix-subsystems)
	and start with an imperative verb. Check the output of `git log --oneline
	files/you/changed` to find out what subsystems your changes touch.

[deokjinkim]

Nit: the commit message title needs to start with an imperative verb to meet the guideline below. This isn't a blocker since it could be fixed by someone when landing the PR. However, it can be fixed also by a force push.

node/doc/contributing/pull-requests.md

Lines 168 to 171 in a1c62cf

	* be prefixed with the name of the changed [subsystem](#appendix-subsystems)
	and start with an imperative verb. Check the output of `git log --oneline
	files/you/changed` to find out what subsystems your changes touch.

@daeyeon Thank you for kind explanation and remind. Updated commit message title starting with an imperative verb.

[nodejs-github-bot]

Landed in ab064d1