build(deps-dev): bump @actions/core from 1.2.6 to 1.9.1

Bumps [@actions/core](https://github.com/actions/toolkit/tree/HEAD/packages/core) from 1.2.6 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:development
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -60,7 +60,7 @@
   },
   "devDependencies": {
     "graphql-tag": "2.12.6",
-    "@actions/core": "1.2.6",
+    "@actions/core": "1.9.1",
     "@apollo/client": "3.6.1",
     "@babel/cli": "7.10.0",
     "@babel/core": "7.10.0",