update(repositories.yaml): add falcosecurity/cncf-green-review-testing

[leogr]

What type of PR is this?

Uncomment one (or more) /kind <> lines:

/kind bug

/kind cleanup

/kind documentation

/kind feature

/kind stable

/kind incubating

/kind sandbox

/kind deprecated

Any specific area of the project related to this PR?

Uncomment one (or more) /area <> lines:

/area governance

/area proposals

/area utils

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #345

Special notes for your reviewer:

/hold until https://github.com/falcosecurity/test-infra/pull/1331

[poiana]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: leogr, maxgio92

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/falcosecurity/evolution/blob/main/OWNERS)~~ [leogr,maxgio92] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[leogr]

/hold cancel