fix(rootfs/Dockerfile): update golangci-lint installation script

[seleznev]

Hi!

install.goreleaser.com was deprecated a long time ago and now it's completely removed:

$ curl install.goreleaser.com
curl: (6) Could not resolve host: install.goreleaser.com

As a result, the latest image doesn't contain golangci-lint anymore:

$ docker run -it --rm quay.io/deis/go-dev:latest golangci-lint --version
docker: Error response from daemon: failed to create task for container: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: exec: "golangci-lint": executable file not found in $PATH: unknown.

For example, one of old images:

$ docker run -it --rm quay.io/deis/go-dev:v1.34.4 golangci-lint --version
golangci-lint has version 1.44.0 built from 617470fa on 2022-01-25T11:31:17Z

So, I suggest to update Dockerfile according to golangci-lint docs.

[mboersma]

lgtm, thank you @seleznev!