faq-migration: add information about improved security

[dholbach]

v1 vs v2: dropped privileges, etc

[rishabh96b]

/label good-first-issue

[rishabh96b]

/assign @kingdonb

[dholbach]

The good thing is, we can now easily link from https://fluxcd.io/flux/migration/faq-migration/ to https://fluxcd.io/flux/security/ and https://fluxcd.io/tags/security/

[hamees-sayed]

Hi @dholbach , I'd like to work on this issue. If I understand correctly, we have to add a security section similar to reconciliation and kustomize support in the v1 vs v2 faq section?

[kingdonb]

Happy to look at this with you @hamees-sayed when you have done some work on it!