build(deps): Bump Microsoft.EntityFrameworkCore.Design and Microsoft.EntityFrameworkCore.Tools (#238)

Bumps [Microsoft.EntityFrameworkCore.Design](https://github.com/dotnet/efcore) and [Microsoft.EntityFrameworkCore.Tools](https://github.com/dotnet/efcore). These dependencies needed to be updated together.

Updates `Microsoft.EntityFrameworkCore.Design` from 8.0.10 to 9.0.0
- [Release notes](https://github.com/dotnet/efcore/releases)
- [Commits](dotnet/efcore@v8.0.10...v9.0.0)

Updates `Microsoft.EntityFrameworkCore.Tools` from 8.0.8 to 9.0.0
- [Release notes](https://github.com/dotnet/efcore/releases)
- [Commits](dotnet/efcore@v8.0.8...v9.0.0)

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

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

Author: dependabot[bot]

GraphQLNetExample/GraphQLNetExample.csproj

@@ -12,12 +12,12 @@
     <PackageReference Include="GraphQL.Server.Transports.AspNetCore" Version="8.0.3" />
     <PackageReference Include="GraphQL.Server.Ui.Altair" Version="8.0.3" />
     <PackageReference Include="GraphQL.SystemTextJson" Version="8.2.0" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="8.0.10">
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="9.0.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="8.0.8" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="8.0.8">
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="9.0.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>