build(deps): bump github.com/prometheus/client_golang from 1.15.0 to 1.15.1

[dependabot[bot]]

Bumps github.com/prometheus/client_golang from 1.15.0 to 1.15.1.

Release notes

Sourced from github.com/prometheus/client_golang's releases.

v1.15.1

Changes

• [BUGFIX] Fixed promhttp.Instrument* handlers wrongly trying to attach exemplar to unsupported metrics (e.g. summary),
  causing panics #1253

Full Changelog: https://github.com/prometheus/client_golang/compare/v1.15.0...v1.15.1

Changelog

Sourced from github.com/prometheus/client_golang's changelog.

Unreleased

Commits

• 4bbb297 Cut 1.15.1 (#1266)
• 2eaffbd Merge pull request #1253 from prometheus/fixpro
• b8fdd23 Added clarification.
• 2ea234e Revert "Remove unnecessary check if label is nil in observeWithExemplar (#1235)"
• See full diff in compare view

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[dependabot[bot]]

Superseded by #131.