build(deps): Bump golang from 1.25.5-bookworm to 1.25.6-bookworm

Bumps golang from 1.25.5-bookworm to 1.25.6-bookworm.

---
updated-dependencies:
- dependency-name: golang
  dependency-version: 1.25.6-bookworm
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Dockerfile

@@ -1,5 +1,5 @@
 # Container for building Go binary.
-FROM golang:1.25.5-bookworm AS builder
+FROM golang:1.25.6-bookworm AS builder
 # Install dependencies
 RUN apt-get update && apt-get install -y --no-install-recommends build-essential git