v2.12.1

Fixes

• fix: add UUID validation to kafka source plugin (#545) @ttuffin

Maintenance

• chore: bump to 2.12.1 (#548) @ptoscano
• chore(deps): bump codecov/codecov-action from 6 to 7 (#546) @dependabot[bot]
• chore: switch to major-only version for codecov/codecov-action (#544) @ptoscano
• [AAP-70205] docs: clarify Gateway authentication requirements (#539) @AlexSCorey