Fix broken link to Identity Service packaging.md (#5900)

doc/packaging.md

@@ -11,7 +11,7 @@ In anticipation of these large-scale changes we've made the current `iotedge` Li
 - `aziot-identity-service`: This package installs daemon's that are responsible for provisioning the device, managing module identities, and managing cryptographic keys and certificates. 
 ## Comparing Packages
 
-A comparison of the contents of each package is below. For more in-depth discussion of the `aziot-identity-service` package, refer to its documentation on [Packaging](https://azure.github.io/iot-identity-service/packaging.html).
+A comparison of the contents of each package is below. For more in-depth discussion of the `aziot-identity-service` package, refer to its documentation on [Packaging](https://github.com/Azure/iot-identity-service/blob/main/docs-dev/packaging.md).
 
 <table>
 <thead>