Add release note for mdn#11414

RELEASE_NOTES.md

@@ -143,6 +143,20 @@ RELEASE DATE TK
 
   </details>
 
+- The `api.PaymentDetailsBase` mixin has been removed and replaced by features representing its exposed interfaces. ([#11414](https://github.com/mdn/browser-compat-data/pull/11414))
+
+  The dictionary `api.PaymentDetailsInit` was also removed as part of this process.
+
+  <details>
+
+  <summary>New features ex-<code>PaymentDetailsBase</code></summary>
+
+  - `api.PaymentDetailsUpdate.displayItems`
+  - `api.PaymentDetailsUpdate.modifiers`
+  - `api.PaymentDetailsUpdate.shippingOptions`
+
+  </details>
+
 - The prefixed non-standard features `api.Point`, `api.Window.convertPointFromNodeToPage`, and `api.Window.convertPointFromPageToNode` were renamed to their actual implementations as `api.WebKitPoint`, `api.Window.webkitConvertPointFromNodeToPage`, and `api.Window.webkitConvertPointFromPageToNode`, respectively. ([#11361](https://github.com/mdn/browser-compat-data/pull/11361))
 
 - The following features duplicating `api.ClipboardEvent` data have been removed ([#11524](https://github.com/mdn/browser-compat-data/pull/11524)):