Refresh azure-mgmt-billing after migrate to Typespec (#47630)

* Configurations:  'specification/billing/resource-manager/Microsoft.Billing/Billing/tspconfig.yaml', API Version: 2024-04-01, SDK Release Type: stable, and CommitSHA: '1523f9e8e89437d84d69a6651f09d74a7ae65ed3' in SpecRepo: 'https://github.com/Azure/azure-rest-api-specs' Pipeline run: https://dev.azure.com/azure-sdk/internal/_build/results?buildId=6474492 Refer to https://eng.ms/docs/products/azure-developer-experience/develop/sdk-release/sdk-release-prerequisites to prepare for SDK release.

* Optimize changelog for azure-mgmt-billing

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Update CHANGELOG.md

---------

Co-authored-by: Yuchao Yan <yuchaoyan@microsoft.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: 3 people

sdk/billing/azure-mgmt-billing/CHANGELOG.md

@@ -3,8 +3,9 @@
   "apiVersions": {
     "Microsoft.Billing": "2024-04-01"
   },
-  "commit": "924420fe602b631163f1e2628337c2dd7f26c173",
+  "commit": "1523f9e8e89437d84d69a6651f09d74a7ae65ed3",
   "repository_url": "https://github.com/Azure/azure-rest-api-specs",
   "typespec_src": "specification/billing/resource-manager/Microsoft.Billing/Billing",
-  "emitterVersion": "0.62.1"
+  "emitterVersion": "0.63.2",
+  "httpClientPythonVersion": "^0.33.0"
 }