chore(deps): bump golang from 1.23.8-alpine to 1.26.4-alpine

Bumps golang from 1.23.8-alpine to 1.26.4-alpine.

---
updated-dependencies:
- dependency-name: golang
  dependency-version: 1.26.4-alpine
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Dockerfile.alpine

@@ -1,5 +1,5 @@
 # Build stage
-FROM golang:1.23.8-alpine AS builder
+FROM golang:1.26.4-alpine AS builder
 
 # Install build tools
 RUN apk add --no-cache build-base