Bump Aspire.Hosting.AppHost (#1743)

Bumps the dotnet group in /docs/extensibility/snippets/MailDevResource/MailDevResource.AppHost with 1 update: [Aspire.Hosting.AppHost](https://github.com/dotnet/aspire).


Updates `Aspire.Hosting.AppHost` from 8.2.0 to 8.2.1
- [Release notes](https://github.com/dotnet/aspire/releases)
- [Commits](dotnet/aspire@v8.2.0...v8.2.1)

---
updated-dependencies:
- dependency-name: Aspire.Hosting.AppHost
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dotnet
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

docs/extensibility/snippets/MailDevResource/MailDevResource.AppHost/MailDevResource.AppHost.csproj

@@ -10,7 +10,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Aspire.Hosting.AppHost" Version="8.2.0" />
+    <PackageReference Include="Aspire.Hosting.AppHost" Version="8.2.1" />
   </ItemGroup>
 
   <ItemGroup>