Merge branch 'renovate/golang-1.x' into 'master'

Update golang Docker tag to v1.20

See merge request !227

Dockerfile

-FROM golang:1.19 AS gobuild
+FROM golang:1.20 AS gobuild
 COPY modsec_logger.go /src/modsec_logger.go
 WORKDIR /src
 RUN go build -tags netgo -o modsec_logger modsec_logger.go