CSP: update refs (#1193)

- CSP scanner domain is dead
- add CSP evaluator

cheatsheets/Content_Security_Policy_Cheat_Sheet.md

@@ -357,6 +357,6 @@ document.getElementById("button1").addEventListener('click', doSomething);
 - [CSP CheatSheet by Scott Helme](https://scotthelme.co.uk/csp-cheat-sheet/)
 - [Breaking Bad CSP](https://www.slideshare.net/LukasWeichselbaum/breaking-bad-csp)
 - [CSP A Successful Mess Between Hardening And Mitigation](https://speakerdeck.com/lweichselbaum/csp-a-successful-mess-between-hardening-and-mitigation)
-- [CSP Scanner](https://cspscanner.com/)
 - [Content Security Policy Guide on AppSec Monkey](https://www.appsecmonkey.com/blog/content-security-policy-header/)
 - CSP Generator: [Chrome](https://chrome.google.com/webstore/detail/content-security-policy-c/ahlnecfloencbkpfnpljbojmjkfgnmdc)/[Firefox](https://addons.mozilla.org/en-US/firefox/addon/csp-generator/)
+- [CSP evaluator](https://csp-evaluator.withgoogle.com/)