Update golang:latest Docker digest to 7ea4c9d (#57)

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

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:b01f7c744a3f1fccaf44905169169fed0ab13e6d1d702a6542d07b34cf677969 as builder
+FROM golang:latest@sha256:7ea4c9dcb2b97ff8ee80a67db3d44f98c8ffa0d191399197007d8459c1453041 as builder
 ARG TARGETOS
 ARG TARGETARCH
 ARG BUILD_FLAGS=""