[Release] Update index.json for extension [ aks-preview ]

Triggered by Azure CLI Extensions Release Pipeline - ADO_BUILD_URL: https://dev.azure.com/azclitools/release/_build/results?buildId=201329&view=results

Last commit: ac773f9

src/index.json

@@ -12017,6 +12017,49 @@
                     "version": "9.0.0b7"
                 },
                 "sha256Digest": "2939aadd8022141b95d83dae59f43f55b6385236c8bf6bb0ae94c7b5f3eb6591"
+            },
+            {
+                "downloadUrl": "https://azcliprod.blob.core.windows.net/cli-extensions/aks_preview-9.0.0b8-py2.py3-none-any.whl",
+                "filename": "aks_preview-9.0.0b8-py2.py3-none-any.whl",
+                "metadata": {
+                    "azext.isPreview": true,
+                    "azext.minCliCoreVersion": "2.61.0",
+                    "classifiers": [
+                        "Development Status :: 4 - Beta",
+                        "Intended Audience :: Developers",
+                        "Intended Audience :: System Administrators",
+                        "Programming Language :: Python",
+                        "Programming Language :: Python :: 3",
+                        "Programming Language :: Python :: 3.6",
+                        "Programming Language :: Python :: 3.7",
+                        "Programming Language :: Python :: 3.8",
+                        "License :: OSI Approved :: MIT License"
+                    ],
+                    "extensions": {
+                        "python.details": {
+                            "contacts": [
+                                {
+                                    "email": "[email protected]",
+                                    "name": "Microsoft Corporation",
+                                    "role": "author"
+                                }
+                            ],
+                            "document_names": {
+                                "description": "DESCRIPTION.rst"
+                            },
+                            "project_urls": {
+                                "Home": "https://github.com/Azure/azure-cli-extensions/tree/main/src/aks-preview"
+                            }
+                        }
+                    },
+                    "generator": "bdist_wheel (0.30.0)",
+                    "license": "MIT",
+                    "metadata_version": "2.0",
+                    "name": "aks-preview",
+                    "summary": "Provides a preview for upcoming AKS features",
+                    "version": "9.0.0b8"
+                },
+                "sha256Digest": "09844ae02ba0d58f9368ae3738f3d4311f5ca721edcc1cf70886fcf8a80cbfb8"
             }
         ],
         "aksarc": [
@@ -37511,7 +37554,7 @@
                 },
                 "sha256Digest": "b731a821c609aae8bfab7e0470b342b9179e7e0c65482f4a432a60d87a4c395f"
             }
-        ],        
+        ],
         "containerapp": [
             {
                 "downloadUrl": "https://azcliprod.blob.core.windows.net/cli-extensions/containerapp-0.1.0-py2.py3-none-any.whl",