Update Aspire branding and links in MAUI template (#37850)

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### Description of Change

This updates the MAUI Aspire Service Defaults template to:

- use the current `Aspire` product name in the editable English
localization source;
- link Service Defaults documentation directly to `aspire.dev`;
- link third-party notices directly to the current `microsoft/aspire`
repository.

PR #32626 corrected the main template manifest but intentionally
reverted localization files. This follow-up updates
`templatestrings.en.json`, the editable source of the English
localization metadata. Generated `templatestrings.json`, translated JSON
files, and `loc/**.lcl` files remain unchanged so the repository's
OneLocBuild workflow can generate the localization follow-up.

### Issues Fixed

Follow-up to #32624 and #32626.

### Validation

- Built and packed `Microsoft.Maui.Templates.csproj`.
- Verified the packaged English template metadata uses `Aspire`.
- Verified both replacement links resolve.
- Verified no editable `.NET Aspire` references or legacy Aspire links
remain.

Co-authored-by: David Pine <7679720+IEvangelist@users.noreply.github.com>
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Author: IEvangelist

src/Templates/src/templates/maui-aspire-servicedefaults/.template.config/localize/templatestrings.en.json

@@ -1,7 +1,7 @@
 {
   "author": "Microsoft",
-  "name": ".NET MAUI for .NET Aspire Service Defaults",
-  "description": "A project template for creating a .NET Aspire service defaults project for .NET MAUI.",
+  "name": ".NET MAUI for Aspire Service Defaults",
+  "description": "A project template for creating an Aspire service defaults project for .NET MAUI.",
   "symbols/Framework/description": "The target framework for the project.",
   "symbols/Framework/choices/DOTNET_TFM_VALUE/description": "Target DOTNET_TFM_VALUE",
   "symbols/skipRestore/description": "If specified, skips the automatic restore of the project on create.",

src/Templates/src/templates/maui-aspire-servicedefaults/.template.config/template.json

@@ -22,7 +22,7 @@
     },
     "precedence": "9000",
     "identity": "MauiAspire.ServiceDefaults.CSharp.8.0",
-    "thirdPartyNotices": "https://aka.ms/dotnet/aspire/third-party-notices",
+    "thirdPartyNotices": "https://github.com/microsoft/aspire/blob/main/THIRD-PARTY-NOTICES.TXT",
     "groupIdentity": "MauiAspire.ServiceDefaults",
     "symbols": {
       "Framework": {

src/Templates/src/templates/maui-aspire-servicedefaults/Extensions.cs

@@ -14,7 +14,7 @@ namespace Microsoft.Extensions.Hosting;
 
 // Adds common Aspire services: service discovery, resilience, health checks, and OpenTelemetry.
 // This project should be referenced by each service project in your solution.
-// To learn more about using this project, see https://aka.ms/dotnet/aspire/service-defaults
+// To learn more about using this project, see https://aspire.dev/get-started/csharp-service-defaults/
 public static class Extensions
 {
     public static TBuilder AddServiceDefaults<TBuilder>(this TBuilder builder) where TBuilder : IHostApplicationBuilder