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

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

src/Ombi/Ombi.csproj

@@ -71,7 +71,7 @@
     <PackageReference Include="CommandLineParser" Version="2.9.1" />
     <PackageReference Include="LazyCache.AspNetCore" Version="2.4.0" />
     <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="8.0.5" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="8.0.5">
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="9.0.0">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>