Enhanced Webhook Events and Payloads Article

[selvaganesh0355]

1. Enhanced explanations of webhook events and their significance.
2. Clarification of the purpose and usage of each delivery header.
3. Improved formatting and readability of the example webhook delivery.
4. Added a "Testing Your Webhooks" section to simplify webhook testing for developers.
5. Minor grammatical and stylistic improvements for better clarity and flow.

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Source	Review	Production	What Changed
webhooks/webhook-events-and-payloads.md	fpt ghec ghes@ 3.16 3.15 3.14 3.13 3.12	fpt ghec ghes@ 3.16 3.15 3.14 3.13 3.12

Key: fpt: Free, Pro, Team; ghec: GitHub Enterprise Cloud; ghes: GitHub Enterprise Server

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[Sharra-writes]

@selvaganesh0355 Thanks for opening a PR! Unfortunately, a lot of the changes you've made to this article don't conform to our style guide. Our contributing docs are a great place to start, too! For changes like the ones you're proposing here, we prefer that you begin by opening an issue, so that the necessity of the changes can be discussed.

Additionally, per our “About contributing to GitHub Docs” article -

We only document GitHub products, features, tools, and extensions. We may mention or link to third-party tools to demonstrate how a feature works, but we do not accept pull requests to document third-party tools or integrations unless they were codeveloped with GitHub.

Since most of these changes are just a reorganization and rewording of information already in the article, or link to third-party tools, I'm going to close this PR. If you would like to open an issue about the changes you would like to see made, though, we would be happy to discuss them in more detail!