Typo in ingress-nginx risky annotations.md

[nuzzzen]

Describe the bug
Small typo in content/notes/ingress-nginx risky annotations.md.

You now need to specify

annotations-risk-level: Critical

in the configmap. If you're using the helm chart, it can be added like so

controller:
   config:
       annotation-risk-level: Critical  #this should be annotations

The latter annotation-risk-level should be renamed to annotations-risk-level, otherwise it won't work.