[Area 1] Change SPAM to UCE (#21190)

Author: Maddy-Cloudflare

src/content/docs/email-security/reference/dispositions-and-attributes.mdx

@@ -33,7 +33,7 @@ You can use disposition values when [creating your quarantine policy](/email-sec
 | `MALICIOUS` | Traffic invoked multiple phishing verdict triggers, met thresholds for bad behavior, and is associated with active campaigns. | Block |
 | `SUSPICIOUS` | Traffic associated with phishing campaigns (and is under further analysis by our automated systems). | Research these messages internally to evaluate legitimacy. |
 | `SPOOF` | Traffic associated with phishing campaigns that is either non-compliant with your email authentication policies (SPF, DKIM, DMARC) or has mismatching `Envelope From` and `Header From` values. | Block after investigating (can be triggered by third-party mail services). |
-| `SPAM` | Traffic associated with non-malicious, commercial campaigns. | Route to existing Spam quarantine folder. |
+| `UCE` (Unsolicited Commercial Emails) | Traffic associated with non-malicious, commercial campaigns. | Route to existing Spam quarantine folder. |
 | `BULK` (dashboard only) | Traffic associated with [Graymail](https://en.wikipedia.org/wiki/Graymail_\(email\)). | Monitor or tag |
 
 ### Header structure