make fails with error: unknown command "/bin/sh" for "yq"

[droid42]

Steps to reproduce:

• remove all local images of "yq"
• make

Result:

Status: Downloaded newer image for mikefarah/yq:latest
Error: unknown command "/bin/sh" for "yq"
Run 'yq --help' for usage.
make: *** [Makefile:131: env] Error 1

Cause:
env.sh has a docker run "mikefarah/yq" which pulls the latest image which for some time now is version 4.x, which incorporates some changes that break compatibility, see https://mikefarah.gitbook.io/yq/upgrading-from-v3:

• entrypoint ist now /usr/bin/yq --> which is why the error above occurs
• In v3 yq had seperate commands for reading/writing/deleting and more. In v4 all these have been embedded into a single expression.

So we should simply use mikefarah/yq:3