chore(deps): update golang:1.24.4 docker digest to 20a022e (elastic#1177)

Co-authored-by: elastic-renovate-prod[bot] <174716857+elastic-renovate-prod[bot]@users.noreply.github.com>

Author: elastic-renovate-prod[bot]

.buildkite/release.yml

@@ -1,7 +1,7 @@
 steps:
   - label: Release
     agents:
-      image: "golang:1.24.4@sha256:10c131810f80a4802c49cab0961bbe18a16f4bb2fb99ef16deaa23e4246fc817"
+      image: "golang:1.24.4@sha256:20a022e5112a144aa7b7aeb3f22ebf2cdaefcc4aac0d64e8deeee8cdc18b9c0f"
       cpu: "16"
       memory: "24G"
       ephemeralStorage: "20G"