Update devcontainer image (#2351)

* Update devcontainer image

* Update .devcontainer/devcontainer.json

Co-authored-by: Jon Gallant <2163001+jongio@users.noreply.github.com>

---------

Co-authored-by: Jon Gallant <2163001+jongio@users.noreply.github.com>

Author: conniey

.devcontainer/devcontainer.json

@@ -1,12 +1,12 @@
 {
-    "image": "mcr.microsoft.com/devcontainers/dotnet:dev-10.0-preview",
+    "image": "mcr.microsoft.com/devcontainers/dotnet:dev-10.0",
     "name": "Microsoft MCP Codespace",
     "features": {
         "ghcr.io/devcontainers/features/node:1": {
             "version": "20"
         },
         "ghcr.io/devcontainers/features/azure-cli:1": {},
-        "ghcr.io/devcontainers/features/powershell:1": {},
+        "ghcr.io/devcontainers/features/powershell:2": {},
         "ghcr.io/devcontainers/features/docker-in-docker:2": {},
         "ghcr.io/azure/azure-dev/azd:0": {}
     },