fix: src/Ombi.Core/Ombi.Core.csproj to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-DOTNET-SYSTEMTEXTJSON-8168848

src/Ombi.Core/Ombi.Core.csproj

@@ -14,7 +14,7 @@
     <PackageReference Include="AutoMapper" Version="12.0.0" />
     <PackageReference Include="AutoMapper.Extensions.Microsoft.DependencyInjection" Version="12.0.0" />
     <PackageReference Include="Microsoft.AspNetCore.Cryptography.KeyDerivation" Version="8.0.5" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="8.0.5" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="9.0.0" />
     <PackageReference Include="MusicBrainzAPI" Version="2.5.0" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="System.Diagnostics.Process" Version="4.3.0" />