Fix Peek on Puma
What does this MR do?
Updates Peek to have https://github.com/peek/peek/pull/113 so that the performance bar works correctly with Puma.
Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/66528.
Does this MR meet the acceptance criteria?
Conformity
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Changelog entry for user-facing changes, or community contribution. Check the link for other scenarios.
Edited by Sean McGivern