chore(deps): update golang:1.25.3 docker digest to 6d4e5e7 (#1421)

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:1.25.3@sha256:0afe9b553123ec160b8282154b7156241ebf43c9033ea2bf9528c6c58c17e89d"
+      image: "golang:1.25.3@sha256:6d4e5e74f47db00f7f24da5f53c1b4198ae46862a47395e30477365458347bf2"
       cpu: "16"
       memory: "24G"
       ephemeralStorage: "20G"