Bump @octokit/rest from 18.5.5 to 18.5.6

Bumps [@octokit/rest](https://github.com/octokit/rest.js) from 18.5.5 to 18.5.6.
- [Release notes](https://github.com/octokit/rest.js/releases)
- [Commits](https://github.com/octokit/rest.js/compare/v18.5.5...v18.5.6)

---
updated-dependencies:
- dependency-name: "@octokit/rest"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -35,7 +35,7 @@
     "@actions/core": "^1.3.0",
     "@actions/exec": "^1.0.4",
     "@actions/github": "^5.0.0",
-    "@octokit/rest": "^18.5.5",
+    "@octokit/rest": "^18.5.6",
     "@types/semver": "^7.3.6",
     "moment": "^2.29.1",
     "semver": "^7.3.5",