Update golang Docker tag to v1.23.6

Author: renovate[bot]

Dockerfile

@@ -16,7 +16,7 @@ WORKDIR /build
 RUN git clone https://github.com/JonasProgrammer/docker-machine-driver-hetzner . && git checkout "${DOCKER_MACHINE_DRIVER_HETZNER_VERSION}" && rm -rf .git
 
 
-FROM golang:1.22.3-alpine@sha256:7e788330fa9ae95c68784153b7fd5d5076c79af47651e992a3cdeceeb5dd1df0 AS builder-go
+FROM golang:1.23.6-alpine@sha256:2c49857f2295e89b23b28386e57e018a86620a8fede5003900f2d138ba9c4037 AS builder-go
 
 ARG BUILD_USER_UID=76543
 ARG BUILD_USER_GID=76543