chore(plugins): update github-copilot-modernization to 1.24.0 (#3591)

Update the existing external plugin listing to the v1.24.0 release
merged in microsoft/github-copilot-modernization#41. Pin the release
merge commit and regenerate the marketplace, following #2811.

Authored-by: GitHub Copilot CLI v1.0.86
Model: GPT-6 Astra (gpt-6-astra)

Co-authored-by: HaoZhang <haozhan@microsoft.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Copilot-Session: c47f454f-e97a-4766-a15b-e0b4df1e536f

.github/plugin/marketplace.json

@@ -1058,7 +1058,7 @@
     {
       "name": "github-copilot-modernization",
       "description": "Autonomous application modernization using multi-agent orchestration for GitHub Copilot CLI. Supports Java upgrades (8→21, Spring Boot 2.x→3.x), .NET modernization, Azure migration, CVE/vulnerability fixing, and application rearchitecture (monolith-to-microservices). Features a 3-level agent hierarchy (orchestrator → coordinators → executors) with enterprise rulebook support for embedding organizational policies into the workflow.",
-      "version": "1.23.0",
+      "version": "1.24.0",
       "author": {
         "name": "Microsoft",
         "url": "https://github.com/microsoft/github-copilot-modernization"
@@ -1082,7 +1082,7 @@
         "source": "github",
         "repo": "microsoft/github-copilot-modernization",
         "path": "plugins/github-copilot-modernization",
-        "sha": "5d2a3268d816f794defb03a45cf527360b16071e"
+        "sha": "a9c9469d86e9dc078018e8fb391abc7744088078"
       }
     },
     {

plugins/external.json

@@ -796,7 +796,7 @@
   {
     "name": "github-copilot-modernization",
     "description": "Autonomous application modernization using multi-agent orchestration for GitHub Copilot CLI. Supports Java upgrades (8→21, Spring Boot 2.x→3.x), .NET modernization, Azure migration, CVE/vulnerability fixing, and application rearchitecture (monolith-to-microservices). Features a 3-level agent hierarchy (orchestrator → coordinators → executors) with enterprise rulebook support for embedding organizational policies into the workflow.",
-    "version": "1.23.0",
+    "version": "1.24.0",
     "author": {
       "name": "Microsoft",
       "url": "https://github.com/microsoft/github-copilot-modernization"
@@ -820,7 +820,7 @@
       "source": "github",
       "repo": "microsoft/github-copilot-modernization",
       "path": "plugins/github-copilot-modernization",
-      "sha": "5d2a3268d816f794defb03a45cf527360b16071e"
+      "sha": "a9c9469d86e9dc078018e8fb391abc7744088078"
     }
   },
   {