Update package.json to 1.1.15

Commit by [GitHub Actions](https://github.com/IShix-g/Unity-GitHubActions/actions/runs/13323524820)

Author: github-actions[bot]

Packages/SimplePackage/package.json

@@ -2,7 +2,7 @@
   "name": "com.ishix.test.package",
   "displayName": "Test pakage",
   "description": "Test simple pakage",
-  "version": "1.1.14",
+  "version": "1.1.15",
   "unity": "2021.3",
   "relatedPackages": {},
   "documentationUrl": "https://github.com/IShix-g/TestPackage",