Fix broken links (#37300)

Author: mccoyp

sdk/core/azure/CHANGELOG.md

@@ -422,7 +422,8 @@ Our goal is to release a stable version by the end of March 2016.  Please send u
 
 **BREAKING CHANGES**
 
-We made our possible to document the breaking from ARM 1.0.0 version to 2.0.0 [here](https://github.com/Azure/azure-sdk-for-python/wiki/Migrate-from-1.0.0-ARM-preview-to-2.0.0).
+~~We made our possible to document the breaking from ARM 1.0.0 version to 2.0.0 here.~~
+The previously-linked documentation is no longer available.
 
 **Dependencies**
 

sdk/purview/azure-purview-sharing/README.md

@@ -569,7 +569,7 @@ This project has adopted the [Microsoft Open Source Code of Conduct][code_of_con
 <!-- LINKS -->
 
 [source_code]: https://github.com/Azure/azure-sdk-for-python/tree/main/sdk/purview/azure-purview-sharing/azure/purview/sharing
-[client_pypi_package]: https://aka.ms/azsdk/python/purviewsharing/pypi
+[client_pypi_package]: https://pypi.org/project/azure-purview-sharing/
 [sharing_ref_docs]: https://aka.ms/azsdk/python/purviewcatalog/ref-docs
 [sharing_product_documentation]: https://azure.microsoft.com/services/purview/
 [azure_subscription]: https://azure.microsoft.com/free/

sdk/purview/azure-purview-sharing/samples/README.md

@@ -59,5 +59,5 @@ pip install azure-purview-sharing
 
 ## Next steps
 
-Check out the [API reference documentation](https://aka.ms/azsdk-purview-sharing-ref) to learn more about
+Check out the [API reference documentation](https://aka.ms/azsdk/python/purviewcatalog/ref-docs) to learn more about
 what you can do with the Azure Purview Sharing API client library.