Bump Microsoft.EntityFrameworkCore.Relational from 5.0.12 to 6.0.3

Bumps [Microsoft.EntityFrameworkCore.Relational](https://github.com/dotnet/efcore) from 5.0.12 to 6.0.3.
- [Release notes](https://github.com/dotnet/efcore/releases)
- [Commits](dotnet/efcore@v5.0.12...v6.0.3)

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

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

Author: dependabot[bot]

src/ChangeDB.Agent.SqlCe/ChangeDB.Agent.SqlCe.csproj

@@ -3,7 +3,7 @@
 
     <ItemGroup>
         <PackageReference Include="Microsoft.EntityFrameworkCore" Version="5.0.12" />
-        <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="5.0.12" />
+        <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="6.0.3" />
         <PackageReference Include="Microsoft.SqlServer.Compact" Version="4.0.8876.1" />
         <PackageReference Include="System.Security.Permissions" Version="5.0.0" />
     </ItemGroup>