[Security] Bump @actions/core from 1.2.3 to 1.2.6

Bumps [@actions/core](https://github.com/actions/toolkit/tree/HEAD/packages/core) from 1.2.3 to 1.2.6. **This update includes a security fix.**
- [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)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package-lock.json

@@ -28,9 +28,9 @@
             }
         },
         "@actions/core": {
-            "version": "1.2.3",
-            "resolved": "https://registry.npmjs.org/@actions/core/-/core-1.2.3.tgz",
-            "integrity": "sha512-Wp4xnyokakM45Uuj4WLUxdsa8fJjKVl1fDTsPbTEcTcuu0Nb26IPQbOtjmnfaCPGcaoPOOqId8H9NapZ8gii4w=="
+            "version": "1.2.6",
+            "resolved": "https://registry.npmjs.org/@actions/core/-/core-1.2.6.tgz",
+            "integrity": "sha512-ZQYitnqiyBc3D+k7LsgSBmMDVkOVidaagDG7j3fOym77jNunWRuYx7VSHa9GNfFZh+zh61xsCjRj4JxMZlDqTA=="
         },
         "@actions/exec": {
             "version": "1.0.3",

package.json

@@ -33,7 +33,7 @@
     },
     "dependencies": {
         "@actions-rs/core": "^0.0.9",
-        "@actions/core": "^1.2.3",
+        "@actions/core": "^1.2.6",
         "@actions/exec": "^1.0.3",
         "@actions/io": "^1.0.2"
     },