Update CVE-2025-7207.yml with patch notes

Author: jasnow

rubies/mruby/CVE-2025-7207.yml

@@ -21,8 +21,7 @@ description: |
 cvss_v2: 1.7
 cvss_v3: 5.5
 cvss_v4: 4.4
-patched_versions:
-  - ">= 3.5.0"
+notes: "Never patched"
 related:
   url:
     - https://nvd.nist.gov/vuln/detail/CVE-2025-7207