Update src/content/changelog/email-security-cf1/2025-09-23-invalid-submissions.mdx

Author: Maddy-Cloudflare

src/content/changelog/email-security-cf1/2025-09-23-invalid-submissions.mdx

@@ -24,7 +24,6 @@ To ensure all customer feedback is actionable, we have launched two new features
 
 Learn more about this feature on [invalid submissions](https://developers.cloudflare.com/cloudflare-one/email-security/email-monitoring/search-email/#invalid-submissions).
 
-
 This feature is available across these Email Security packages: 
 -   **Advantage** 
 -   **Enterprise**