docs: remove duplicate title in 'about-audit-reports.mdx' (#1056)

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remove duplicate title
<img width="859" alt="iShot_2024-04-17_17 03 21"
src="https://github.com/npm/documentation/assets/21079164/ca2af1a9-3252-4379-b022-6535efcb5af5">


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content/packages-and-modules/securing-your-code/about-audit-reports.mdx

@@ -2,8 +2,6 @@
 title: About audit reports
 ---
 
-# About audit reports
-
 Audit reports contain tables of information about security vulnerabilities in your project's dependencies to help you fix the vulnerability or troubleshoot further.
 
 <Screenshot src="/packages-and-modules/securing-your-code/audit-report-results.png" alt="Screenshot showing command-line audit report results" />