Add golangci to renovate configuration

[nadiamoe]

Description

This PR instructs renovate to check golangci-lint tag from the comment in .golangci.yml.

Demo PR: https://github.com/roobre/xk6-disruptor/pull/14

Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works.
• I have run linter locally (make lint) and all checks pass.
• I have run tests locally (make test) and all tests pass.
• I have run relevant e2e test locally (make e2e-xxx for agent, disruptors, kubernetes or cluster related changes)
• Any dependent changes have been merged and published in downstream modules
  

[pablochacin]

@roobre I don't think this PR fixes #232 because we still need to either change the configuration of golangci or make changes in the code to solve the issues listed by the linter as seen in roobre#14

[nadiamoe]

You're right, I was too optimistic thinking we would be able to merge the update just fine. Let me strip the Fixes line.

[pablochacin]

LGTM