chore(deps): update image ghcr.io/kumbuka-me/kumbuka to v0.3.0

[renovate]

This PR contains the following updates:

Package	Update	Change
ghcr.io/kumbuka-me/kumbuka	minor	v0.2.0 → v0.3.0

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Release Notes

kumbuka-me/kumbuka (ghcr.io/kumbuka-me/kumbuka)

v0.3.0

Compare Source

Changelog

• dbb54da test: provide repository to browser auth setup
• 912f2cf fix: update threaded discussion call sites
• 8068dba feat: add threaded page discussions

v0.2.1

Compare Source

Changelog

• 1fc9489 fix: auto-detect Kumbuka archive imports
• fd85b2c git commit -m feat: add portable Kumbuka archives
• e7bb990 feat(plugin): mediate widget commands through host

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