chore(deps): bump Microsoft.EntityFrameworkCore.Design

Bumps [Microsoft.EntityFrameworkCore.Design](https://github.com/dotnet/efcore) from 6.0.6 to 6.0.7.
- [Release notes](https://github.com/dotnet/efcore/releases)
- [Commits](dotnet/efcore@v6.0.6...v6.0.7)

---
updated-dependencies:
- dependency-name: Microsoft.EntityFrameworkCore.Design
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Rnwood.Smtp4dev/Rnwood.Smtp4dev.csproj

@@ -28,7 +28,7 @@
 		<PackageReference Include="Microsoft.AspNetCore.Hosting.WindowsServices" Version="6.0.7" />
 		<PackageReference Include="Microsoft.AspNetCore.StaticFiles" Version="2.2.0" />
 		<PackageReference Include="Microsoft.EntityFrameworkCore.Analyzers" Version="6.0.7" />
-		<PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="6.0.6">
+		<PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="6.0.7">
 		  <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
 		  <PrivateAssets>all</PrivateAssets>
 		</PackageReference>