Bump github.com/prometheus/client_golang from 1.21.0 to 1.21.1

[dependabot]

Bumps github.com/prometheus/client_golang from 1.21.0 to 1.21.1.

Release notes

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

v1.21.1 / 2025-03-04

This release addresses a performance regression introduced in #1661 -- thanks to all who reported this quickly: @​chlunde, @​dethi, @​aaronbee @​tsuna @​kakkoyun 💪🏽. This patch release also fixes the iOS build.

We will be hardening the release process even further (#1759, #1761) to prevent this in future, sorry for the inconvenience!

The high concurrency optimization is planned to be eventually reintroduced, however in a much safer manner, potentially in a separate API.

• [BUGFIX] prometheus: Revert of Inc, Add and Observe cumulative metric CAS optimizations (#1661), causing regressions on low concurrency cases #1757
• [BUGFIX] prometheus: Fix GOOS=ios build, broken due to process_collector_* wrong build tags. #1758

• Revert "exponential backoff for CAS operations on floats" and cut 1.21.1 by @​bwplotka in prometheus/client_golang#1757
• Fix ios build for 1.21.1 by @​bwplotka in prometheus/client_golang#1758

Full Changelog: prometheus/client_golang@v1.21.0...v1.21.1

Changelog

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

1.21.1 / 2025-03-04

• [BUGFIX] prometheus: Revert of Inc, Add and Observe cumulative metric CAS optimizations (#1661), causing regressions on low contention cases.
• [BUGFIX] prometheus: Fix GOOS=ios build, broken due to process_collector_* wrong build tags.

Commits

• 8a42da3 Fix ios build. (#1758)
• 40c62f7 Merge pull request #1757 from prometheus/revert-121cas
• 689f590 Cut 1.21.1
• 9e567a7 Revert "Add: exponential backoff for CAS operations on floats (#1661)"
• See full diff in compare view

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[ahg-g]

/lgtm
/approve

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[kfswain]

/lgtm