test(eslint-plugin): fix a typo in a test, causing it to test the `error` type rather than the `unknown` type#10204

JoshuaKGoldberg merged 2 commits intotypescript-eslint:maintypescript-eslint/typescript-eslint:mainfrom

ronami:fix-test-typoronami/typescript-eslint:fix-test-typoCopy head branch name to clipboard