[Release] Update index.json for extension [ network-manager ] (#3982)

Triggered by Azure CLI Extensions Release Pipeline - ADO_BUILD_ID=1148554

Last commit: 304ca0a

Author: Azure CLI Bot

src/index.json

@@ -23872,6 +23872,51 @@
                 "sha256Digest": "6ec3fe5ff3d92c3c2c8ba581af679567bfc430dd38fa70945b43378cf9b81ff2"
             }
         ],
+        "virtual-network-manager": [
+            {
+                "downloadUrl": "https://azcliprod.blob.core.windows.net/cli-extensions/virtual_network_manager-0.1.0-py3-none-any.whl",
+                "filename": "virtual_network_manager-0.1.0-py3-none-any.whl",
+                "metadata": {
+                    "azext.isPreview": true,
+                    "azext.minCliCoreVersion": "2.15.0",
+                    "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/master/src/network-manager"
+                            }
+                        }
+                    },
+                    "generator": "bdist_wheel (0.30.0)",
+                    "license": "MIT",
+                    "metadata_version": "2.0",
+                    "name": "virtual-network-manager",
+                    "summary": "Microsoft Azure Command-Line Tools NetworkManagementClient Extension",
+                    "version": "0.1.0"
+                },
+                "sha256Digest": "fd34cc2d8e2cbb80831e62cf4b64e0e4c6a295ac717b07ebc5a9f311f12cb95f"
+            }
+        ],
         "virtual-network-tap": [
             {
                 "downloadUrl": "https://azurecliprod.blob.core.windows.net/cli-extensions/virtual_network_tap-0.1.0-py2.py3-none-any.whl",