build(deps): update quay.io/prometheus/prometheus docker tag to v3.8.1

[renovate]

This PR contains the following updates:

Package	Update	Change
quay.io/prometheus/prometheus	minor	3.7.3 → 3.8.1

---

Release Notes

prometheus/prometheus (quay.io/prometheus/prometheus)

v3.8.1

Compare Source

• [BUGFIX] remote: Fix Remote Write receiver, so it does not send wrong response headers for v1 flow and cause Prometheus senders to emit false partial error log and metrics. #​17683

v3.8.0

Compare Source

• [CHANGE] Remote-write: Update receiving to 2.0-rc.4 spec. "created timestamp" (CT) is now called "start timestamp" (ST). #​17411
• [CHANGE] TSDB: Native Histogram Custom Bounds with a NaN threshold are now rejected. #​17287
• [FEATURE] OAuth2: support jwt-bearer grant-type (RFC7523 3.1). #​17592
• [FEATURE] Dockerfile: Add OpenContainers spec labels to Dockerfile. #​16483
• [FEATURE] SD: Add unified AWS service discovery for ec2, lightsail and ecs services. #​17406
• [FEATURE] Native histograms are now a stable, but optional feature, use the scrape_native_histogram config setting. #​17232 #​17315
• [FEATURE] UI: Support anchored and smoothed keyword in promql editor. #​17239
• [FEATURE] UI: Show detailed relabeling steps for each discovered target. #​17337
• [FEATURE] Alerting: Add urlQueryEscape to template functions. #​17403
• [FEATURE] Promtool: Add Remote-Write 2.0 support to promtool push metrics via the --protobuf_message flag. #​17417
• [ENHANCEMENT] Clarify the docs about handling negative native histograms. #​17249
• [ENHANCEMENT] Mixin: Add static UID to the remote-write dashboard. #​17256
• [ENHANCEMENT] PromQL: Reconcile mismatched NHCB bounds in Add and Sub. #​17278
• [ENHANCEMENT] Alerting: Add "unknown" state for alerting rules that haven't been evaluated yet. #​17282
• [ENHANCEMENT] Scrape: Allow simultaneous use of classic histogram → NHCB conversion and zero-timestamp ingestion. #​17305
• [ENHANCEMENT] UI: Add smoothed/anchored in explain. #​17334
• [ENHANCEMENT] OTLP: De-duplicate any target_info samples with the same timestamp for the same series. #​17400
• [ENHANCEMENT] Document use_fips_sts_endpoint in sigv4 config sections. #​17304
• [ENHANCEMENT] Document Prometheus Agent. #​14519
• [PERF] PromQL: Speed up parsing of variadic functions. #​17316
• [PERF] UI: Speed up alerts/rules/... pages by not rendering collapsed content. #​17485
• [PERF] UI: Performance improvement when getting label name and values in promql editor. #​17194
• [PERF] UI: Speed up /alerts for many firing alerts via virtual scrolling. #​17254
• [BUGFIX] PromQL: Fix slice indexing bug in info function on churning series. #​17199
• [BUGFIX] API: Reduce lock contention on /api/v1/targets. #​17306
• [BUGFIX] PromQL: Consistent handling of gauge vs. counter histograms in aggregations. #​17312
• [BUGFIX] TSDB: Allow NHCB with -Inf as the first custom value. #​17320
• [BUGFIX] UI: Fix duplicate loading of data from the API speed up rendering of some pages. #​17357
• [BUGFIX] Old UI: Fix createExpressionLink to correctly build /graph URLs so links from Alerts/Rules work again. #​17365
• [BUGFIX] PromQL: Avoid panic when parsing malformed info call. #​17379
• [BUGFIX] PromQL: Include histograms when enforcing sample_limit. #​17390
• [BUGFIX] Config: Fix panic if TLS CA file is absent. #​17418
• [BUGFIX] PromQL: Fix histogram_fraction for classic histograms and NHCB if lower bound is in the first bucket. #​17424

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.