deps(docker): bump golang from 1.24 to 1.26

Bumps golang from 1.24 to 1.26.

---
updated-dependencies:
- dependency-name: golang
  dependency-version: '1.26'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Dockerfile

@@ -2,7 +2,7 @@
 # Supports multi-arch: linux/amd64, linux/arm64
 
 # --- Build stage ---
-FROM golang:1.24 AS builder
+FROM golang:1.26 AS builder
 
 WORKDIR /workspace