Update dependency @actions/core to v1.9.1 [SECURITY]

Author: renovate[bot]

package.json

@@ -22,7 +22,7 @@
   "author": "Leigh Brenecki <leigh@brenecki.id.au>",
   "license": "MIT",
   "dependencies": {
-    "@actions/core": "1.6.0",
+    "@actions/core": "1.9.1",
     "@actions/tool-cache": "2.0.1"
   },
   "devDependencies": {