chore(deps): update dependency eslint-plugin-testing-library to v6.4.0

Author: renovate[bot]

package.json

@@ -32,7 +32,7 @@
     "eslint-config-next": "14.2.15",
     "eslint-config-prettier": "9.1.0",
     "eslint-plugin-jsx-a11y": "6.10.0",
-    "eslint-plugin-testing-library": "6.3.4",
+    "eslint-plugin-testing-library": "6.4.0",
     "husky": "9.1.6",
     "jsdom": "25.0.1",
     "lint-staged": "15.2.10",