chore(deps): update golang docker tag to v1.25.1 (elastic#1300)

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:1.25.0@sha256:5502b0e56fca23feba76dbc5387ba59c593c02ccc2f0f7355871ea9a0852cebe"
+      image: "golang:1.25.1@sha256:bb979b278ffb8d31c8b07336fd187ef8fafc8766ebeaece524304483ea137e96"
       cpu: "16"
       memory: "24G"
       ephemeralStorage: "20G"