docs: metrcis (#33868)

### Issue # (if applicable)

Typo

### 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: dltacube

packages/aws-cdk-lib/aws-lambda/README.md

@@ -869,7 +869,7 @@ fn.addEventSource(new eventsources.DynamoEventSource(table, {
 
 ### Observability
 
-Customers can now opt-in to get enhanced metrics for their event source mapping that capture each stage of processing using the `MetrcisConfig` property.
+Customers can now opt-in to get enhanced metrics for their event source mapping that capture each stage of processing using the `MetricsConfig` property.
 
 The following code shows how to opt in for the enhanced metrics.