Release 21.40.1

What's Changed

Improvements

• Add Video Playback Exited event to Video Spec by @tawe-segment in #1990
• Updated customerio source process and screenshots by @glosier in #1988
• FB conversions API docs updates by @kdaswani in #1997
• Update FB Pixel and Conversions API docs by @kdaswani in #1996
• Added info about how to prevent duplication in the Klaviyo source by @coreyching in #1994

Fixes

• Fix message_id type in ruby docs by @whatthewhat in #1989

Other Updates

• Update library changelogs and version numbers by @markzegarelli in #1984
• Target the correct branch for page edits by @markzegarelli in #1991

New Contributors

• @whatthewhat made their first contribution in #1989

Full Changelog: 21.39.3...21.40.1