build(deps): bump @actions/core from 2.0.2 to 3.0.0

Bumps [@actions/core](https://github.com/actions/toolkit/tree/HEAD/packages/core) from 2.0.2 to 3.0.0.
- [Changelog](https://github.com/actions/toolkit/blob/main/packages/core/RELEASES.md)
- [Commits](https://github.com/actions/toolkit/commits/HEAD/packages/core)

---
updated-dependencies:
- dependency-name: "@actions/core"
  dependency-version: 3.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package-lock.json

@@ -34,7 +34,7 @@
   },
   "homepage": "https://docs.slack.dev/tools/slack-github-action/",
   "dependencies": {
-    "@actions/core": "^2.0.1",
+    "@actions/core": "^3.0.0",
     "@actions/github": "^7.0.0",
     "@slack/logger": "^4.0.0",
     "@slack/web-api": "^7.13.0",