build(deps): bump golang from c259ff7 to 18e6f5a

Bumps golang from `c259ff7` to `18e6f5a`.

---
updated-dependencies:
- dependency-name: golang
  dependency-version: 1.26.2-alpine3.22
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Dockerfile

@@ -2,7 +2,7 @@ ARG BASE_IMAGE=alpine
 
 FROM --platform=$BUILDPLATFORM tonistiigi/xx:1.9.0@sha256:c64defb9ed5a91eacb37f96ccc3d4cd72521c4bd18d5442905b95e2226b0e707 AS xx
 
-FROM --platform=$BUILDPLATFORM golang:1.26.2-alpine3.22@sha256:c259ff7ffa06f1fd161a6abfa026573cf00f64cfd959c6d2a9d43e3ff63e8729 AS builder
+FROM --platform=$BUILDPLATFORM golang:1.26.2-alpine3.22@sha256:18e6f5ac93b69cc7b5b2be4dab9554568c9d8921a5f25f10a59df88ccb005f0d AS builder
 
 COPY --from=xx / /