chore: release main

[google-github-actions-bot]

:robot: I have created a release beep boop

3.4.0

3.4.0 (2022-08-15)

Features

• provide inputs for releaser and manifest options in release-please 13.15 (#474) (4482754)
• read github api/graphql url from action context (#532) (922ac8b)

Bug Fixes

• bump release-please from 13.20.0 to 13.21.0 (#559) (bab175e)
• default labels should be undefined (#566) (0647714)

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