chore(deps): update module github.com/prometheus/client_golang to v1.12.1

This MR contains the following updates:

Package	Type	Update	Change
github.com/prometheus/client_golang	require	patch	v1.12.0 -> v1.12.1

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Release Notes

prometheus/client_golang

v1.12.1

Compare Source

• [BUGFIX] Make the Go 1.17 collector concurrency-safe #​969
  • Use simpler locking in the Go 1.17 collector #​975
• [BUGFIX] Reduce granularity of histogram buckets for Go 1.17 collector #​974
• [ENHANCEMENT] API client: make HTTP reads more efficient #​976

Full Changelog: https://github.com/prometheus/client_golang/compare/v1.12.0...v1.12.1

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