Update golang:latest Docker digest to c42e4d7 (#238)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Dockerfile

@@ -1,6 +1,6 @@
 
 # Build a go app into a minimal docker image with timezone support and SSL cert chains.
-FROM golang:latest@sha256:fb612b7831d53a89cbc0aaa7855b69ad7b0caf603715860cf538df854d047b84 as builder
+FROM golang:latest@sha256:c42e4d75186af6a44eb4159dcfac758ef1c05a7011a0052fe8a8df016d8e8fb9 as builder
 ARG TARGETOS
 ARG TARGETARCH
 ARG BUILD_FLAGS=""