fix: package.json & package-lock.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-ACTIONSCORE-2980270

Author: snyk-bot

package-lock.json

@@ -25,7 +25,7 @@
     "@vercel/ncc": "^0.33.4"
   },
   "dependencies": {
-    "@actions/core": "^1.8.2",
+    "@actions/core": "^1.9.1",
     "@actions/exec": "^1.1.1"
   }
 }