Update dependency linq2db to v6

Author: renovate[bot]

Lagrange.XocMat/Lagrange.XocMat.csproj

@@ -40,7 +40,7 @@
 
   <ItemGroup>
     <PackageReference Include="Lagrange.Core.Upcoming" Version="1.0.7" />
-    <PackageReference Include="linq2db" Version="5.4.1.9" />
+    <PackageReference Include="linq2db" Version="6.3.0" />
     <PackageReference Include="MessagePack" Version="3.1.4" />
     <PackageReference Include="Microsoft.Data.Sqlite" Version="10.0.5" />
     <PackageReference Include="Microsoft.Extensions.Hosting" Version="10.0.5" />