Fixed section numbering in security documentation (#174)

Author: list-jonas

content/docs/security.mdx

@@ -49,7 +49,7 @@ You can enable HTTPS-Only Mode in **all windows** or **private windows only**
 
 For more information visit [HTTPS-Only Mode in Firefox](https://support.mozilla.org/en-US/kb/https-only-prefs)
 
-###43. Deceptive Content and Dangerous Software Protection
+### 4. Deceptive Content and Dangerous Software Protection
 
 Zen Browser helps protect you from **phishing, malware, and fraudulent websites**. It uses URL filters and real-time checks to block harmful content, making your browsing experience safer.