update (#11629)

Author: colawwj

specification/securityinsights/resource-manager/readme.typescript.md

@@ -7,7 +7,7 @@ Please also specify `--typescript-sdks-folder=<path to root folder of your azure
 typescript:
   azure-arm: true
   package-name: "@azure/arm-securityinsight"
-  output-folder: "$(typescript-sdks-folder)/packages/@azure/arm-securityinsight"
+  output-folder: "$(typescript-sdks-folder)/sdk/securityinsight/arm-securityinsight"
   clear-output-folder: true
   generate-metadata: true
 ```