[Logging] `ElasticsearchLogstashHandler` is suggesting to use handlers without explaining it

[alexislefebvre]

On https://symfony.com/doc/5.x/logging/handlers.html

We see:

In a production environment, it's highly recommended to wrap this handler in a handler with buffering capabilities (like the FingersCrossedHandler or BufferHandler) in order to call Elasticsearch only once with a bulk push.

But there are no explanation to configure these handlers.

Proposal: It would be nice to show how to do it.

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Here is what happens when I try to search these words: