Bump @octokit/webhooks from 9.20.0 to 9.26.3

Bumps [@octokit/webhooks](https://github.com/octokit/webhooks.js) from 9.20.0 to 9.26.3.
- [Release notes](https://github.com/octokit/webhooks.js/releases)
- [Commits](octokit/webhooks.js@v9.20.0...v9.26.3)

---
updated-dependencies:
- dependency-name: "@octokit/webhooks"
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -26,7 +26,7 @@
     "@octokit/core": "^3.5.1",
     "@octokit/plugin-rest-endpoint-methods": "^5.13.0",
     "@octokit/rest": "^18.5.6",
-    "@octokit/webhooks": "^9.20.0",
+    "@octokit/webhooks": "^9.26.3",
     "@octokit/webhooks-types": "^4.18.0",
     "@probot/octokit-plugin-config": "^1.1.4",
     "@types/common-tags": "^1.8.1",