fix(deps): update module gitlab.com/gitlab-org/labkit to v1.21.0

This MR contains the following updates:

Package	Type	Update	Change
gitlab.com/gitlab-org/labkit	require	minor	v1.20.0 -> v1.21.0

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Release Notes

gitlab-org/labkit (gitlab.com/gitlab-org/labkit)

v1.21.0

Compare Source

Features

• allow to unwrap the loggingResponseWriter (7dfae6d)

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