docs: update readme

README.md

@@ -8,6 +8,15 @@ Cloudformation does not support creating a certificate for an IoT Thing, so this
 
 This construct is a modified version of this excellent [construct (cdk-iot-core-certificate)](https://github.com/devops-at-home/cdk-iot-core-certificates) to work with aws-sdk-js-v3.
 
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+[![View on Construct Hub](https://constructs.dev/badge?package=cdk-iot-core-certificates-v3)](https://constructs.dev/packages/cdk-iot-core-certificates-v3)
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 ## Installation
 
 ```bash