Update grafana/tempo:latest Docker digest to 21d5638

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [prom/prometheus](https://github.com/prometheus/prometheus) | minor | `v3.5.0` -> `v3.6.0` |

---

### Release Notes

<details>
<summary>prometheus/prometheus (prom/prometheus)</summary>

### [`v3.6.0`](https://github.com/prometheus/prometheus/releases/tag/v3.6.0): 3.6.0 / 2025-09-17

[Compare Source](https://github.com/prometheus/prometheus/compare/v3.5.0...v3.6.0)

- \[FEATURE] PromQL: Add `step()`, and `min()` and `max()` on durations, behind feature flag `promql-duration-expr`. [#&#8203;16777](https://github.com/prometheus/prometheus/issues/16777)
- \[FEATURE] API: Add a `/v1/status/tsdb/blocks` endpoint exposing metadata about loaded blocks. [#&#8203;16695](https://github.com/prometheus/prometheus/issues/16695)
- \[FEATURE] Templates: Add `toDuration()` and `now()` functions. [#&#8203;16619](https://github.com/prometheus/prometheus/issues/16619)
- \[ENHANCEMENT] Discovery: Add support for attaching namespace metadata to targets. [#&#8203;16831](https://github.com/prometheus/prometheus/issues/16831)
- \[ENHANCEMENT] OTLP: Support new `UnderscoreEscapingWithoutSuffixes` strategy via `otlp.translation_strategy`. [#&#8203;16849](https://github.com/prometheus/prometheus/issues/16849)
- \[ENHANCEMENT] OTLP: Support including scope metadata as metric labels via `otlp.promote_scope_metadata`. [#&#8203;16878](https://github.com/prometheus/prometheus/issues/16878)
- \[ENHANCEMENT] OTLP: Add `__type__` and `__unit__` labels when feature flag `type-and-unit-labels` is enabled. [#&#8203;16630](https://github.com/prometheus/prometheus/issues/16630)
- \[ENHANCEMENT] Tracing: Send the traceparent HTTP header during scrapes. [#&#8203;16425](https://github.com/prometheus/prometheus/issues/16425)
- \[ENHANCEMENT] UI: Add option to disable info and warning query messages under `Query page settings`. [#&#8203;16901](https://github.com/prometheus/prometheus/issues/16901)
- \[ENHANCEMENT] UI: Improve metadata handling for `_count/_sum/_bucket` suffixes. [#&#8203;16910](https://github.com/prometheus/prometheus/issues/16910)
- \[ENHANCEMENT] TSDB: Track stale series in the Head block via the `prometheus_tsdb_head_stale_series` metric. [#&#8203;16925](https://github.com/prometheus/prometheus/issues/16925)
- \[PERF] PromQL: Improve performance due to internal optimizations. [#&#8203;16797](https://github.com/prometheus/prometheus/issues/16797)
- \[BUGFIX] Config: Fix "unknown global name escaping method" error messages produced during config validation. [#&#8203;16801](https://github.com/prometheus/prometheus/issues/16801)
- \[BUGFIX] Discovery: Fix race condition during shutdown. [#&#8203;16820](https://github.com/prometheus/prometheus/issues/16820)
- \[BUGFIX] OTLP: Generate `target_info` samples between the earliest and latest samples per resource. [#&#8203;16737](https://github.com/prometheus/prometheus/issues/16737)
- \[BUGFIX] PromQL: Fail when `NaN` is passed as parameter to `topk()`, `bottomk()`, `limitk()` and `limit_ratio()`. [#&#8203;16725](https://github.com/prometheus/prometheus/issues/16725)
- \[BUGFIX] PromQL: Fix extrapolation for native counter histograms. [#&#8203;16828](https://github.com/prometheus/prometheus/issues/16828)
- \[BUGFIX] PromQL: Reduce numerical errors by disabling some optimizations. [#&#8203;16895](https://github.com/prometheus/prometheus/issues/16895)
- \[BUGFIX] PromQL: Fix inconsistencies when using native histograms in subqueries. [#&#8203;16879](https://github.com/prometheus/prometheus/issues/16879)
- \[BUGFIX] PromQL: Fix inconsistent annotations for `rate()` and `increase()` on histograms when feature flag `type-and-unit-labels` is enabled. [#&#8203;16915](https://github.com/prometheus/prometheus/issues/16915)
- \[BUGFIX] Scraping: Fix memory corruption in `slicelabels` builds. [#&#8203;16946](https://github.com/prometheus/prometheus/issues/16946)
- \[BUGFIX] TSDB: Fix panic on append when feature flag `created-timestamp-zero-ingestion` is enabled. [#&#8203;16332](https://github.com/prometheus/prometheus/issues/16332)
- \[BUGFIX] TSDB: Fix panic on append for native histograms with empty buckets. [#&#8203;16893](https://github.com/prometheus/prometheus/issues/16893)

</details>

---

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---

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Reviewed-on: https://git.valverde.cloud/Thilawyn/website/pulls/12
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compose.yml

@@ -48,7 +48,7 @@ services:
 
   tempo:
     <<: *service-base
-    image: grafana/tempo:latest@sha256:a4361e69d7f260f0a465f92b090dc53f5b07b81151b10c1ca92fad9948dc258f
+    image: grafana/tempo:latest@sha256:21d563828e55c2ee4e79f9a4bf9e1abfa4f585213f9f5e49d9b98e44fac92f2c
     command: [-config.file=/etc/tempo.yaml]
     volumes:
       - ./telemetry/tempo.yaml:/etc/tempo.yaml
@@ -56,7 +56,7 @@ services:
     stop_signal: SIGKILL
 
   prometheus:
-    image: prom/prometheus:v3.5.0@sha256:63805ebb8d2b3920190daf1cb14a60871b16fd38bed42b857a3182bc621f4996
+    image: prom/prometheus:v3.6.0@sha256:76947e7ef22f8a698fc638f706685909be425dbe09bd7a2cd7aca849f79b5f64
     command:
       - --config.file=/etc/prometheus.yaml
       - --web.enable-remote-write-receiver