🚀 nuget: bump Microsoft.EntityFrameworkCore.Design (#665)

Bumps [Microsoft.EntityFrameworkCore.Design](https://github.com/dotnet/efcore) from 7.0.11 to 7.0.12.
- [Release notes](https://github.com/dotnet/efcore/releases)
- [Commits](dotnet/efcore@v7.0.11...v7.0.12)

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

src/jmbde.Shared/jmbde.Shared.csproj

@@ -20,7 +20,7 @@
     <PackageReference Include="Bogus" Version="34.0.2" />
     <PackageReference Include="FluentValidation" Version="11.7.1" />
     <PackageReference Include="Microsoft.EntityFrameworkCore" Version="7.0.11" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="7.0.11">
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="7.0.12">
       <IncludeAssets
       >runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>