fix(deps): update dependency @octokit/webhooks-definitions to v3.66.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@octokit/webhooks-definitions	3.65.6 -> 3.66.0

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Release Notes

octokit/webhooks

### [`v3.66.0`](https://togithub.com/octokit/webhooks/releases/v3.66.0) [Compare Source](https://togithub.com/octokit/webhooks/compare/v3.65.7...v3.66.0) ##### Bug Fixes - type of `requester` property on `InstallationEvent` & `InstallationRepositoriesEvent` should be `User` and not `null` ([#​428](https://togithub.com/octokit/webhooks/issues/428)) ([08a1a17](https://togithub.com/octokit/webhooks/commit/08a1a17a45effb4813af2abbbbbe4c64e41a3dbf)), closes [#​427](https://togithub.com/octokit/webhooks/issues/427) ##### Features - add new `DiscussionEvent`, `DiscussionCommentEvent` schemas and examples ([#​426](https://togithub.com/octokit/webhooks/issues/426)) ([4d94d0b](https://togithub.com/octokit/webhooks/commit/4d94d0b0ad14d0598cd5925f16c723a802dd877f)) ### [`v3.65.7`](https://togithub.com/octokit/webhooks/releases/v3.65.7) [Compare Source](https://togithub.com/octokit/webhooks/compare/v3.65.6...v3.65.7) ##### Bug Fixes - don't include `$id` property in compiled schema ([#​430](https://togithub.com/octokit/webhooks/issues/430)) ([c6e232f](https://togithub.com/octokit/webhooks/commit/c6e232f3198cbaa62103197ef0a2b91472289285))

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