fix(cli-lib): set skipLibCheck on generateSchema to prevent intermittent test failures (#26551)

Attempts to resolve intermittent failures in the cloud-assembly-schema test case.


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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: mrgrain

packages/aws-cdk-lib/cloud-assembly-schema/scripts/update-schema.ts

@@ -59,6 +59,7 @@ export function generateSchema(schemaName: string, saveToFile: boolean = true) {
     topRef: true,
     noExtraProps: false,
     out,
+    skipLibCheck: true,
   };
 
   const compilerOptions = {