chore(deps): update dependency golang to v1.18.4

Author: renovate[bot]

Dockerfile

@@ -4,7 +4,7 @@ ARG             VCS_REF
 ARG             VERSION
 
 # build
-FROM            golang:1.18.3-alpine as builder
+FROM            golang:1.18.4-alpine as builder
 RUN             apk add --no-cache git gcc musl-dev make
 ENV             GO111MODULE=on
 WORKDIR         /go/src/moul.io/golang-repo-template