Update Helm release gitlab-agent to v1.23.0

This MR contains the following updates:

Package	Update	Change
gitlab-agent	minor	1.18.0 -> 1.23.0

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Release Notes

gitlab-org/charts/gitlab-agent (gitlab-agent)

v1.23.0

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v1.22.0

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v1.21.0

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v1.20.0

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v1.19.0

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v1.18.1

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Configuration

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