fix(deps): update dependency @actions/core to v3

Author: renovate[bot]

package-lock.json

@@ -14,7 +14,7 @@
     "author": "Statens Pensjonskasse",
     "license": "MIT",
     "dependencies": {
-        "@actions/core": "^1.11.1",
+        "@actions/core": "^3.0.0",
         "@actions/exec": "^1.1.1",
         "@actions/github": "^6.0.1"
     },