Bump eslint-plugin-testing-library

Bumps [eslint-plugin-testing-library](https://github.com/testing-library/eslint-plugin-testing-library) from 3.10.2 to 7.7.0.
- [Release notes](https://github.com/testing-library/eslint-plugin-testing-library/releases)
- [Changelog](https://github.com/testing-library/eslint-plugin-testing-library/blob/main/.releaserc.json)
- [Commits](testing-library/eslint-plugin-testing-library@v3.10.2...v7.7.0)

---
updated-dependencies:
- dependency-name: eslint-plugin-testing-library
  dependency-version: 7.7.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

graylog2-web-interface/packages/eslint-config-graylog/package.json

@@ -26,7 +26,7 @@
     "eslint-plugin-jsx-a11y": "6.4.1",
     "eslint-plugin-react": "7.24.0",
     "eslint-plugin-react-hooks": "4.2.0",
-    "eslint-plugin-testing-library": "3.10.2",
+    "eslint-plugin-testing-library": "7.7.0",
     "eslint-plugin-jest-dom": "3.8.1"
   }
 }