Fix typo in intro (#18645)

Author: felicitymay

content/code-security/secure-coding/index.md

@@ -1,7 +1,7 @@
 ---
 title: Finding security vulnerabilities and errors in your code
 shortTitle: Secure coding
-intro: 'Keep your code secure by using secret scanning to identify and fix potential security vulnerabilities and other errors in your code.'
+intro: 'Keep your code secure by using {% data variables.product.prodname_code_scanning %} to identify and fix potential security vulnerabilities and other errors in your code.'
 product: '{% data reusables.gated-features.code-scanning %}'
 redirect_from:
   - /github/managing-security-vulnerabilities/finding-security-vulnerabilities-in-your-projects-code