fix: correct typo 'notfication' to 'notification' in Stack docstring (#35455)

### Issue # (if applicable)

Closes #35433.

### Reason for this change

Corrects a typo in the Javadoc for `StackProps.notificationArns` where "notfication" was misspelled.

### Description of changes

Fixed the spelling of "notification" in the Javadoc comment for `StackProps.notificationArns` in `core/lib/stack.ts`.  
No functional code changes; documentation only.

### Describe any new or updated permissions being added

No new or updated IAM permissions are required.

### Description of how you validated changes

Verified the documentation change by inspecting the updated comment.  
No code or tests affected.

### Checklist
- [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

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*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: zvoicu000

packages/aws-cdk-lib/core/lib/stack.ts

@@ -138,7 +138,7 @@ export interface StackProps {
   /**
    * SNS Topic ARNs that will receive stack events.
    *
-   * @default - no notfication arns.
+   * @default - no notification arns.
    */
   readonly notificationArns?: string[];