Add dependencies policy example

[gabibguti]

In the 2023 Security Slam, it was reported that it's hard to understand how to fill the env-dependencies-policy field in SECURITY-INSIGHTS.yml. It would be great to add at least one example on how to fill this information.

We may want to use https://github.com/kubescape/kubescape/blob/master/docs/environment-dependencies-policy.md as a starting point.

We may want to highlight that this document should fulfill questions like:

• "are dependencies regularly checked for updates? how often?"
• "are bots used to update dependencies? which bot?"
• "only dependencies that have regular updates are added to the project?"
• "only dependencies that have verified signatures are added to the project?"
• "only dependencies that have provenance are added to the project?"
• "are dependencies always pinned to a specific version?"
• "are dependencies not always pinned to a specific version because the project is a library?"
• "are dependencies that stop receiving updates / become archived removed?"
• "are dependencies that contain CVEs patched, downgraded or removed?"

Additionally, we may want to highlight that this documentation can be shortly written in the comment subfield or, if the documentation needs to be more extensive, then advise to use the policy-url subfield.

[eddie-knight]

This is really helpful, thanks @gabibguti 🙇‍♂️

@luigigubello can we get this on the agenda for the next community call?