chore(ci): fix ci images tags

[kaahos]

What does this PR do?:

fix pinned image for slack-notifier and pin Alpine image to 3.22.1.

Motivation:

Some CI jobs fail due to security policies that require to pin every container image to an immutable version.

Additional Notes:

How to test the change?:

• CI all green.

For Datadog employees:

• If this PR touches code that signs or publishes builds or packages, or handles
  credentials of any kind, I've requested a security review (run the dd:platform-security-review
  skill, or file a request via the PSEC review form).
  bewaire also runs automatically on every PR.
• This PR doesn't touch any of that.
• JIRA: [JIRA-XXXX]

Unsure? Have a question? Request a review!

[dd-octo-sts]

Benchmark Results (commit fbdb78d)

Pipeline: https://gitlab.ddbuild.io/DataDog/apm-reliability/benchmarking-platform/-/pipelines/126244881 Commit: fbdb78d2c19e5c5026b200cd2302697c10e2cc14

⚠️ Significant outliers

• 🔴 fj-kmeans (JDK 21): runtime +6.6% (2672→2848 ms)

Runtime details (per benchmark × JDK)

Benchmark	JDK	Latest	Dev	Δ (dev vs latest)	Issues L/D
akka-uct	21	✅ 10314 ms (21 iters)	✅ 10384 ms (21 iters)	≈ +0.7% (±11.8%)	— / —
akka-uct	25	✅ 8900 ms (24 iters)	✅ 8892 ms (24 iters)	≈ -0.1% (±10.4%)	— / —
finagle-chirper	21	✅ 5983 ms (33 iters)	✅ 5967 ms (33 iters)	≈ -0.3% (±25.2%)	⚠️ W:3 / ⚠️ W:3
fj-kmeans	21	✅ 2672 ms (69 iters)	✅ 2848 ms (66 iters)	🔴 +6.6%	— / —
future-genetic	25	✅ 2123 ms (88 iters)	✅ 2134 ms (87 iters)	≈ +0.5% (±2.4%)	— / —
naive-bayes	21	✅ 1281 ms (134 iters)	✅ 1245 ms (139 iters)	≈ -2.8% (±31.8%)	— / —
naive-bayes	25	✅ 1010 ms (169 iters)	✅ 1026 ms (167 iters)	≈ +1.6% (±31.7%)	— / —
reactors	25	✅ 18470 ms (15 iters)	✅ 18950 ms (15 iters)	≈ +2.6% (±4.5%)	— / —

Internal counter details (ddprof)

ddprof internal counters, latest / dev (✅ = 0, · = unavailable):

Benchmark	JDK	Dropped rec	Dropped jvmti	Dropped trace	Skipped WC	AGCT fail	Unwind fail
akka-uct	21	✅ / ✅	✅ / ✅	2 / 1	2029 / 1995	✅ / ✅	✅ / ✅
akka-uct	25	✅ / ✅	✅ / ✅	2 / 2	2080 / 2442	✅ / ✅	✅ / ✅
finagle-chirper	21	✅ / ✅	✅ / ✅	2 / 1	8902 / 8451	✅ / ✅	✅ / ✅
finagle-chirper	25	✅ / ✅	✅ / ✅	2 / 2	7986 / 8304	✅ / ✅	✅ / ✅
fj-kmeans	21	✅ / ✅	✅ / ✅	✅ / 2	1243 / 1266	✅ / ✅	✅ / ✅
future-genetic	25	✅ / ✅	✅ / ✅	1 / 1	2949 / 2920	✅ / ✅	✅ / ✅
naive-bayes	21	✅ / ✅	✅ / ✅	6 / 1	3545 / 3529	✅ / ✅	✅ / ✅
naive-bayes	25	✅ / ✅	✅ / ✅	2 / 2	3454 / 3502	✅ / ✅	✅ / ✅
reactors	21	✅ / ✅	✅ / ✅	✅ / ✅	✅ / ✅	✅ / ✅	✅ / ✅
reactors	25	✅ / ✅	✅ / ✅	2 / ✅	1882 / 1866	✅ / ✅	✅ / ✅

[dd-octo-sts]

CI Test Results

Run: #29924609086 | Commit: c764926 | Duration: 3h 0m 16s (longest job)

❌ 1 of 32 test jobs failed

Status Overview

JDK	glibc-aarch64/debug	glibc-amd64/debug	musl-aarch64/debug	musl-amd64/debug
8	-	✅	-	-
8-ibm	-	🚫	-	-
8-j9	✅	✅	-	-
8-librca	-	-	✅	✅
8-orcl	-	✅	-	-
11	-	✅	-	-
11-j9	✅	✅	-	-
11-librca	-	-	✅	✅
17	✅	✅	-	-
17-graal	✅	✅	-	-
17-j9	✅	✅	-	-
17-librca	-	-	✅	✅
21	✅	✅	-	-
21-graal	✅	✅	-	-
21-librca	-	-	✅	✅
25	✅	✅	-	-
25-graal	❌	✅	-	-
25-librca	-	-	✅	✅

Legend: ✅ passed | ❌ failed | ⚪ skipped | 🚫 cancelled

Failed Tests

glibc-aarch64/debug / 25-graal

Job: View logs

No detailed failure information available. Check the job logs.

Summary: Total: 32 | Passed: 30 | Failed: 1 | Cancelled: 1

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Updated: 2026-07-22 16:39:32 UTC