chore(deps): update dependency @testing-library/react to v15

Author: renovate[bot]

core/package.json

@@ -55,7 +55,7 @@
     "styled-components": "6.1.3"
   },
   "devDependencies": {
-    "@testing-library/react": "^14.0.0",
+    "@testing-library/react": "^15.0.0",
     "@types/react-test-renderer": "^18.0.0",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",