docs(stepfunctions): Fix typo Langauge => Language (#24010)

Hi team,

Please have a look at this minor fix for a typo.

Thanks

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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: yuyokk

packages/@aws-cdk/aws-stepfunctions/README.md

@@ -460,7 +460,7 @@ It's possible that the high-level constructs for the states or `stepfunctions-ta
 the states or service integrations you are looking for. The primary reasons for this lack of
 functionality are:
 
-* A [service integration](https://docs.aws.amazon.com/step-functions/latest/dg/concepts-service-integrations.html) is available through Amazon States Langauge, but not available as construct
+* A [service integration](https://docs.aws.amazon.com/step-functions/latest/dg/concepts-service-integrations.html) is available through Amazon States Language, but not available as construct
   classes in the CDK.
 * The state or state properties are available through Step Functions, but are not configurable
   through constructs