Update src/content/docs/cloudflare-one/email-security/email-monitoring/search-email.mdx

Co-authored-by: marciocloudflare <[email protected]>

Author: Maddy-Cloudflare

src/content/docs/cloudflare-one/email-security/email-monitoring/search-email.mdx

@@ -172,7 +172,7 @@ A submission is invalid when:
 
 To ensure your submission is valid:
 
-- Ensure your submission has a file attached and the file has a .EML extension.
+- Ensure your submission has a file attached with a `.eml` file extension.
 - Ensure you configure the domain you are submitting emails for.
 - Ensure policies are configured correctly.