chore(deps): update prom/alertmanager docker tag to v0.31.0

[renovate]

This PR contains the following updates:

Package	Update	Change
prom/alertmanager	minor	v0.29.0 → v0.31.0

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Release Notes

prometheus/alertmanager (prom/alertmanager)

v0.31.0

Compare Source

v0.30.1: 0.30.1 / 2026-01-12

Compare Source

• [BUGFIX] Fix memory leak in tracing client. #​4828

v0.30.0: 0.30.0 / 2025-12-15

Compare Source

• [CHANGE] Don't allow calling qids with an empty ids list. #​4707
• [FEATURE] Add mattermost integration. #​4090
• [FEATURE] Add saturday to the first day of the week options. #​4473
• [FEATURE] Add templating functions for working with urls. #​4625
• [FEATURE] cluster: Allow persistent peer names. #​4636
• [FEATURE] dispatch: Add start delay. #​4704
• [FEATURE] provider: Add subscriber channel metrics. #​4630
• [FEATURE] template: Add tojson function. #​4773
• [FEATURE] Add api http metrics. #​4162
• [FEATURE] Add distributed tracing support. #​4745
• [FEATURE] Add names to inhibit rules. #​4628
• [FEATURE] Add timeout option for pagerduty notifier. #​4354
• [FEATURE] Add timeout option for slack notifier. #​4355
• [FEATURE] Allow nested details fields in pagerduty. #​3944
• [FEATURE] Implement phantom_threading to group email alerts into threads. #​4623
• [FEATURE] gc: Report errors, but remove erroneous silences and continue. #​4724
• [FEATURE] jira: Template customfields. #​4029
• [FEATURE] jira: Allow configuring issue update via parameter. #​4621
• [FEATURE] Slack app support. #​4211
• [ENHANCEMENT] Add comment about smtp plain authentication. #​4741
• [ENHANCEMENT] Add documentation about high availability. #​4708
• [ENHANCEMENT] Add documentation for client_allowed_sans. #​4706
• [ENHANCEMENT] Improve logging around webhook dispatch failure. #​4511
• [ENHANCEMENT] Compile silence matchers when the silence is added. #​4695
• [ENHANCEMENT] Fix 's/client/alerts_api/g' broken link in 0.29. #​4718
• [ENHANCEMENT] Fix rocketchat_config docs. #​4767
• [ENHANCEMENT] Fix: <mute_time_interval> was renamed. #​4729
• [ENHANCEMENT] Improve inhibition performance. #​4607
• [ENHANCEMENT] Loadsnapshot: update matcher index properly while not holding lock. #​4714
• [ENHANCEMENT] Logging improvements. #​4113
• [ENHANCEMENT] Move query locking back into private query function. #​4694
• [ENHANCEMENT] Optimize the new inhibitor implementation for ~2.5x performance improvement. #​4668
• [ENHANCEMENT] Reduce the time dispatch.group holds the mutex. #​4670
• [ENHANCEMENT] Use b.loop() to simplify the code and improve performance. #​4642
• [ENHANCEMENT] Remove duplicate slice during silences query. #​4696
• [ENHANCEMENT] Silences: optimize incremental mutes queries via a silence version index. #​4723
• [ENHANCEMENT] Update description for filter param in openapi. #​4775
• [BUGFIX] Add new behavior to avoid races on config reload. #​4705
• [BUGFIX] config: Fix duplicate header detection for all case variants. #​2810
• [BUGFIX] marker: Stop state leakage from aggregation groups. #​4438
• [BUGFIX] Fix pprof debug endpoints not working with --web.route-prefix. #​4698
• [BUGFIX] Set context timeout for resolvepeers. #​4343

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[github-actions]

Docker Image Vulnerability Report

Tip

Summary: No HIGH/CRITICAL vulnerabilities found across 1 image(s). 🎉

Changed compose files: src/Pi4/docker-compose.yml

New/changed images being scanned:

• prom/alertmanager:v0.30.0

---

prom/alertmanager:v0.30.0

✅ No HIGH or CRITICAL vulnerabilities found.

[github-actions]

Docker Image Vulnerability Report

Tip

Summary: No HIGH/CRITICAL vulnerabilities found across 1 image(s). 🎉

Changed compose files: src/Pi4/docker-compose.yml

New/changed images being scanned:

• prom/alertmanager:v0.30.1

---

prom/alertmanager:v0.30.1

✅ No HIGH or CRITICAL vulnerabilities found.