Update golang:latest Docker digest to 6bac879 (#208)

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:dd08f769578a5f51a22bf6a81109288e23cfe2211f051a5c29bd1c05ad3db52a as builder
+FROM golang:latest@sha256:6bac879c5b77e0fc9c556a5ed8920e89dab1709bd510a854903509c828f67f96 as builder
 ARG TARGETOS
 ARG TARGETARCH
 ARG BUILD_FLAGS=""