Update prototype extension to 0.2.1b6 (#9761)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: a11smiles

src/index.json

@@ -93595,8 +93595,8 @@
         ],
         "prototype": [
             {
-                "downloadUrl": "https://github.com/Azure/az-prototype/releases/download/v0.2.1b5/prototype-0.2.1b5-py3-none-any.whl",
-                "filename": "prototype-0.2.1b5-py3-none-any.whl",
+                "downloadUrl": "https://github.com/Azure/az-prototype/releases/download/v0.2.1b6/prototype-0.2.1b6-py3-none-any.whl",
+                "filename": "prototype-0.2.1b6-py3-none-any.whl",
                 "metadata": {
                     "azext.isPreview": true,
                     "azext.minCliCoreVersion": "2.50.0",
@@ -93674,9 +93674,9 @@
                         }
                     ],
                     "summary": "Azure CLI extension for rapid prototype generation using AI agents and GitHub Copilot",
-                    "version": "0.2.1b5"
+                    "version": "0.2.1b6"
                 },
-                "sha256Digest": "c2153c4c0ae0586ec54bd9aadcff1d81c0054715bd6b9a2d28c520ce093551f2"
+                "sha256Digest": "a4bf67ad84289b00ab1bf3ae60753ed60f9a147174111b64980a84398f9a9e6f"
             }
         ],
         "providerhub": [
@@ -120313,4 +120313,4 @@
         ]
     },
     "formatVersion": "1"
-}
+}