Bump @actions/core from 1.2.0 to 1.9.1 (#22)

Bumps [@actions/core](https://github.com/actions/toolkit/tree/HEAD/packages/core) from 1.2.0 to 1.9.1.
- [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-type: direct:production
...

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package.json

@@ -39,7 +39,7 @@
  "url": "https://github.com/guibranco/file-reader-action-v2/issues"
  },
  "dependencies": {
- "@actions/core": "^1.2.0"
+ "@actions/core": "^1.9.1"
  },
  "devDependencies": {
  "@types/jest": "^24.0.23",