Bump Microsoft.EntityFrameworkCore from 8.0.10 to 9.0.0 in /src

Bumps [Microsoft.EntityFrameworkCore](https://github.com/dotnet/efcore) 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)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

src/Directory.Packages.props

@@ -9,7 +9,7 @@
     <PackageVersion Include="EntityFramework" Version="6.5.1" />
     <PackageVersion Include="MarkdownSnippets.MsBuild" Version="27.0.2" />
     <PackageVersion Include="Microsoft.AspNetCore.Mvc.Testing" Version="8.0.10" />
-    <PackageVersion Include="Microsoft.EntityFrameworkCore" Version="8.0.10" />
+    <PackageVersion Include="Microsoft.EntityFrameworkCore" Version="9.0.0" />
     <PackageVersion Include="Microsoft.EntityFrameworkCore.InMemory" Version="8.0.10" />
     <PackageVersion Include="Microsoft.EntityFrameworkCore.Relational" Version="8.0.10" />
     <PackageVersion Include="Microsoft.EntityFrameworkCore.Sqlite" Version="8.0.10" />