docs/_security: shorten the wording in the alert box

docs/_security.html

@@ -31,11 +31,8 @@
 <p style="border: 2px green solid; padding: 6px 6px 6px 6px;">
  <b>Alert:</b> if you look up curl CVEs in public sources
  like <a href="https://nvd.nist.gov">NVD</a> you will find they
- use <i>inflated</i> severity levels and CVSS scores. They think they know
- better and override our assessments. This is a systemic error that we
- unfortunately cannot fix. Feel free to complain to them - we keep doing it to
- no use - and consider using our material as the canonical sources for curl
- issues.
+ use <i>inflated</i> severity levels and CVSS scores. Consider using <b>our</b>
+ material as the canonical sources for curl issues.
 </p>
 
 SUBTITLE(Past security audits)