chore(deps): update dependency stripe/stripe-ios-spm to from: "24.19.0" (cgrindel#1763)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
|
[stripe/stripe-ios-spm](https://redirect.github.com/stripe/stripe-ios-spm)
| minor | `from: "24.18.1"` -> `from: "24.19.0"` |

---

### Release Notes

<details>
<summary>stripe/stripe-ios-spm (stripe/stripe-ios-spm)</summary>

###
[`v24.19.0`](https://redirect.github.com/stripe/stripe-ios-spm/releases/tag/24.19.0)

[Compare
Source](https://redirect.github.com/stripe/stripe-ios-spm/compare/24.18.1...24.19.0)

#### 24.19.0 2025-08-04

##### PaymentSheet

- \[Fixed] Updated default spacing of form elements in PaymentSheet.
- \[Added] EmbeddedPaymentElement now shows mandates in a form sheet
when `rowSelectionBehavior` is `immediateAction` and
`embeddedViewDisplaysMandateText` is `true`. Previously, this
configuration was an error.

</details>

---

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examples/stripe_example/Package.resolved

@@ -7,7 +7,7 @@ let package = Package(
     dependencies: [
         .package(
             url: "https://github.com/stripe/stripe-ios-spm.git",
-            from: "24.18.1"
+            from: "24.19.0"
         ),
     ]
 )