refactor(docs): remove abbreviation

committed from GitHub web

Co-authored-by: Sanchith Hegde <[email protected]>

crates/api_models/src/payments.rs

@@ -5332,7 +5332,7 @@ pub struct RetrievePaymentLinkResponse {
     pub status: PaymentLinkStatus,
     #[schema(value_type = Option<Currency>)]
     pub currency: Option<api_enums::Currency>,
-    /// Secure payment link (with security checks and listing SPMs)
+    /// Secure payment link (with security checks and listing saved payment methods)
     pub secure_link: Option<String>,
 }