build(deps): bump @actions/core from 1.8.2 to 1.9.1 (#798)

Bumps [@actions/core](https://github.com/actions/toolkit/tree/HEAD/packages/core) from 1.8.2 to 1.9.1.
- [Release notes](https://github.com/actions/toolkit/releases)
- [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
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -23,7 +23,7 @@
   },
   "homepage": "https://github.com/codecov/codecov-action#readme",
   "dependencies": {
-    "@actions/core": "^1.8.2",
+    "@actions/core": "^1.9.1",
     "@actions/exec": "^1.1.1",
     "@actions/github": "^5.0.3",
     "node-fetch": "^3.2.4",