fix: fix China region arn typo (#4820)

Co-authored-by: Andrea Amorosi <[email protected]>

Author: jinxiao

docs/getting-started/lambda-layers.md

@@ -53,7 +53,7 @@ We publish the Lambda Layer for Powertools for AWS Lambda in all commercial regi
 | `mx-central-1`   | [arn:aws:lambda:mx-central-1:094274105915:layer:AWSLambdaPowertoolsTypeScriptV2:41](#){: .copyMe}          |
 | `us-gov-west-1`  | [arn:aws-us-gov:lambda:us-gov-west-1:165093116878:layer:AWSLambdaPowertoolsTypeScriptV2:41](#){: .copyMe}  |
 | `us-gov-east-1`  | [arn:aws-us-gov:lambda:us-gov-east-1:165087284144:layer:AWSLambdaPowertoolsTypeScriptV2:41](#){: .copyMe}  |
-| `cn-north-1`     | [arn:aws-aws-cn:lambda:cn-north-1:498634801083:layer:AWSLambdaPowertoolsTypeScriptV2:41](#){: .copyMe}     |
+| `cn-north-1`     | [arn:aws-cn:lambda:cn-north-1:498634801083:layer:AWSLambdaPowertoolsTypeScriptV2:41](#){: .copyMe}         |
 
 ### Lookup Layer ARN via AWS SSM Parameter Store