Fix test to so it only expects CSP2 to work in Edge 76+
Fix test to so it only expects CSP2 to work in Edge 76+

caniuse-db@1.0.30000886 changed the CSP status of Edge 15-75
to be incomplete because of a nonce bug:
https://github.com/Fyrd/caniuse/pull/4488

Munter/express-legacy-csp