chore: update contact email

Author: EndBug

action.yml

@@ -1,6 +1,6 @@
 name: Label Sync
 description: An action that allows you to sync labels from a repository or a config file
-author: Federico Grandi <fgrandi30@gmail.com>
+author: Federico Grandi <federicograndi@duck.com>
 
 runs:
   using: node16

package.json

@@ -14,7 +14,7 @@
     "type": "git",
     "url": "git+https://github.com/EndBug/label-sync.git"
   },
-  "author": "Federico Grandi <fgrandi30@gmail.com>",
+  "author": "Federico Grandi <federicograndi@duck.com>",
   "license": "MIT",
   "private": true,
   "bugs": {