Update dependency @testing-library/jest-dom to v5.16.2

Editor assessment

The subject names @testing-library/jest-dom and the destination version v5.16.2, which completely determines the change without the diff. The chore type and deps scope are accurate for a test-utility maintenance bump, and no body is needed for a routine version update whose motivation is inherent to dependency upkeep. No footers are present, so there is no noise and nothing malformed. Style is clean: imperative phrasing, no trailing period, no ticket junk, comfortable length, consistent language. The message communicates its full content in one unambiguous line, misleads nowhere, and serves as a clean, publishable example of automated maintenance communication.