manager: use image from 'knot-resolver-ci'

This was forgotten during the CI overhaul.

requested review from @amrazek

(Requires knot-resolver-ci!2 (merged) to be merged and tagged first)

added 4 commits

• 5e9fbfff...e1ba5705 - 3 commits from branch master
• 0a493200 - manager: use image from 'knot-resolver-ci'

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added 1 commit

• eb996bf9 - manager/.gitlab-ci.yml: add Python 3.13

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added 1 commit

• 29013863 - manager/pyproject.toml: update Poetry

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added 1 commit

• bc4371db - manager/pyproject.toml: update Poetry

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added 2 commits

• dbe3f808 - manager: use image from 'knot-resolver-ci'
• 5a1be7a0 - manager/pyproject.toml: update Poetry

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merged

mentioned in commit 2fdbf6f6