deps: bump github.com/prometheus/client_golang from 1.20.5 to 1.21.0

[dependabot]

Bumps github.com/prometheus/client_golang from 1.20.5 to 1.21.0.

Release notes

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

v1.21.0 / 2025-02-19

⚠️ This release contains potential breaking change if you upgrade github.com/prometheus/common to 0.62+ together with client_golang (and depend on the strict, legacy validation for the label names). New common version changes model.NameValidationScheme global variable, which relaxes the validation of label names and metric name, allowing all UTF-8 characters. Typically, this should not break any user, unless your test or usage expects strict certain names to panic/fail on client_golang metric registration, gathering or scrape. In case of problems change model.NameValidationScheme to old model.LegacyValidation value in your project init function. ⚠️

• [BUGFIX] gocollector: Fix help message for runtime/metric metrics. #1583
• [BUGFIX] prometheus: Fix Desc.String() method for no labels case. #1687
• [PERF] prometheus: Optimize popular prometheus.BuildFQName function; now up to 30% faster. #1665
• [PERF] prometheus: Optimize Inc, Add and Observe cumulative metrics; now up to 50% faster under high concurrent contention. #1661
• [CHANGE] Upgrade prometheus/common to 0.62.0 which changes model.NameValidationScheme global variable. #1712
• [CHANGE] Add support for Go 1.23. #1602
• [FEATURE] process_collector: Add support for Darwin systems. #1600 #1616 #1625 #1675 #1715
• [FEATURE] api: Add ability to invoke CloseIdleConnections on api.Client using api.Client.(CloseIdler).CloseIdleConnections() casting. #1513
• [FEATURE] promhttp: Add promhttp.HandlerOpts.EnableOpenMetricsTextCreatedSamples option to create OpenMetrics _created lines. Not recommended unless you want to use opt-in Created Timestamp feature. Community works on OpenMetrics 2.0 format that should make those lines obsolete (they increase cardinality significantly). #1408
• [FEATURE] prometheus: Add NewConstNativeHistogram function. #1654

... (truncated)

Changelog

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

1.21.0 / 2025-02-17

⚠️ This release contains potential breaking change if you upgrade github.com/prometheus/common to 0.62+ together with client_golang. ⚠️

New common version changes model.NameValidationScheme global variable, which relaxes the validation of label names and metric name, allowing all UTF-8 characters. Typically, this should not break any user, unless your test or usage expects strict certain names to panic/fail on client_golang metric registration, gathering or scrape. In case of problems change model.NameValidationScheme to old model.LegacyValidation value in your project init function.

• [BUGFIX] gocollector: Fix help message for runtime/metric metrics. #1583
• [BUGFIX] prometheus: Fix Desc.String() method for no labels case. #1687
• [ENHANCEMENT] prometheus: Optimize popular prometheus.BuildFQName function; now up to 30% faster. #1665
• [ENHANCEMENT] prometheus: Optimize Inc, Add and Observe cumulative metrics; now up to 50% faster under high concurrent contention. #1661
• [CHANGE] Upgrade prometheus/common to 0.62.0 which changes model.NameValidationScheme global variable. #1712
• [CHANGE] Add support for Go 1.23. #1602
• [FEATURE] process_collector: Add support for Darwin systems. #1600 #1616 #1625 #1675 #1715
• [FEATURE] api: Add ability to invoke CloseIdleConnections on api.Client using api.Client.(CloseIdler).CloseIdleConnections() casting. #1513
• [FEATURE] promhttp: Add promhttp.HandlerOpts.EnableOpenMetricsTextCreatedSamples option to create OpenMetrics _created lines. Not recommended unless you want to use opt-in Created Timestamp feature. Community works on OpenMetrics 2.0 format that should make those lines obsolete (they increase cardinality significantly). #1408
• [FEATURE] prometheus: Add NewConstNativeHistogram function. #1654

Commits

• eaf03ef Cut 1.21.0 (#1737)
• f1f89dc Cut 1.21.0-rc.0 (#1718)
• c923f7c Revert "ci: daggerize test and lint pipelines (#1534)" (#1717)
• 1bcda80 process collector: Fixed pedantic registry failures on darwin with cgo. (#1715)
• 038b37a tutorials/whatsup: Updated deps (#1716)
• 56a2431 docs: Add RELEASE.md for the release process (#1690)
• cbd9526 Merge pull request #1713 from prometheus/dependabot/go_modules/tutorials/what...
• 80b5a2a build(deps): bump golang.org/x/net in /tutorials/whatsup
• 1a822a8 Upgrade to prometheus/common 0.62.0 with breaking change (#1712)
• 7b39d01 Update common Prometheus files (#1708)
• Additional commits viewable in compare view

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