Updated advisory posts against rubysec/ruby-advisory-db@1c7d5b5

Author: Cdestewart

advisories/_posts/2024-02-26-CVE-2024-27456.md

@@ -15,6 +15,8 @@ advisory:
     rack-cors (aka Rack CORS Middleware) 2.0.1 has 0666 permissions
     for the .rb files.
   notes: Never patched
+  unaffected_versions:
+  - "< 2.0.1"
   related:
     url:
     - https://nvd.nist.gov/vuln/detail/CVE-2024-27456