Bump @actions/core from 1.11.1 to 2.0.0

Bumps [@actions/core](https://github.com/actions/toolkit/tree/HEAD/packages/core) from 1.11.1 to 2.0.0.
- [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: 2.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

package.json

@@ -21,7 +21,7 @@
     "test": "npm run lint && npm run build && git diff --exit-code"
   },
   "dependencies": {
-    "@actions/core": "1.11.1",
+    "@actions/core": "2.0.0",
     "markdownlint-cli2": "0.20.0"
   },
   "devDependencies": {