[Email Security] Remove instances of api-first (cloudflare#22869)

* [Email Security] Remove instances of api-first

* Fixing typo

Author: Maddy-Cloudflare

src/content/docs/cloudflare-one/email-security/index.mdx

@@ -12,10 +12,10 @@ Refer to [Area 1](/email-security/) if you are looking for the Area 1 documentat
 :::
 
 <Description>
-Secure your email inbox with API-first Email Security.
+Secure your email inbox with Email Security.
 </Description>
 
-Email Security secures your email inbox with API-first email security. Email Security integrates with your existing email provider and blocks phishing attacks, malware, [Business Email Compromise](https://www.cloudflare.com/en-gb/learning/email-security/business-email-compromise-bec/) attacks, and vendor email fraud.
+Email Security secures your email inbox by integrating with your existing email provider and blocking phishing attacks, malware, [Business Email Compromise](https://www.cloudflare.com/en-gb/learning/email-security/business-email-compromise-bec/) attacks, and vendor email fraud.
 
 Email Security overview page allows you to: