fix(deps): update dependency @octokit/action to v4

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@octokit/action	^3.1.6 -> ^4.0.0

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Release Notes

octokit/action.js

### [`v4.0.1`](https://togithub.com/octokit/action.js/releases/tag/v4.0.1) [Compare Source](https://togithub.com/octokit/action.js/compare/v4.0.0...v4.0.1) ##### Bug Fixes - **deps:** update dependency [@​octokit/core](https://togithub.com/octokit/core) to v4 ([#​399](https://togithub.com/octokit/action.js/issues/399)) ([5b2767b](https://togithub.com/octokit/action.js/commit/5b2767bd7791ebc3102e2a41f6830bbdb1b9f197)) ### [`v4.0.0`](https://togithub.com/octokit/action.js/releases/tag/v4.0.0) [Compare Source](https://togithub.com/octokit/action.js/compare/v3.18.1...v4.0.0) ##### Continuous Integration - stop testing against NodeJS v10, v12 ([#​397](https://togithub.com/octokit/action.js/issues/397)) ([0d6a408](https://togithub.com/octokit/action.js/commit/0d6a40816d8cc3b701a028b33377e82485dfce56)) ##### BREAKING CHANGES - Drop support for NodeJS v10, v12 ### [`v3.18.1`](https://togithub.com/octokit/action.js/releases/tag/v3.18.1) [Compare Source](https://togithub.com/octokit/action.js/compare/v3.18.0...v3.18.1) ##### Bug Fixes - **deps:** bump `@octokit/core` from 3.5.1 to 3.6.0 to track release containing fix for `node-fetch` vulnerability ([#​379](https://togithub.com/octokit/action.js/issues/379)) ([830ee79](https://togithub.com/octokit/action.js/commit/830ee79399bb2afcc5189b2c38d8537dcd662c69)) ### [`v3.18.0`](https://togithub.com/octokit/action.js/releases/tag/v3.18.0) [Compare Source](https://togithub.com/octokit/action.js/compare/v3.17.3...v3.18.0) ##### Features - `.actions.downloadWorkflowRunAttemptLogs()`, `.actions.getWorkflowRunAttempt()`, `.repos.generateReleaseNotes()`, `.checks.rerequestRun()`. Graduate `nebula`, `zzzax`, `switcheroo`, `baptiste` previews. Removes defunkt `/repos/{owner}/{repo}/actions/runs/{run_id}/retry` endpoint. Renames methods to have consistent `AuthenticatedUser()` suffix, deprecates previous method names ([#​369](https://togithub.com/octokit/action.js/issues/369)) ([309b6e6](https://togithub.com/octokit/action.js/commit/309b6e6019fdec3bacb42fbc07384b8036286e40))

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