fix(deps): update module gitlab.com/gitlab-org/labkit to v1.31.4

This MR contains the following updates:

Package	Change	Age	Confidence
gitlab.com/gitlab-org/labkit	v1.31.3 -> v1.31.4

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Release Notes

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

v1.31.4

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Bug Fixes

• tracing: Fix formatting of url.URL attributes. (65ea481), closes gitlab-org/labkit#78

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