Bump FirebirdSql.Data.FirebirdClient from 6.6.0 to 8.5.2 (#2898)

Author: dependabot[bot]

src/NHibernate.Test/NHibernate.Test.csproj

@@ -63,7 +63,7 @@
     <PackageReference Include="NUnit" Version="3.13.2" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.15.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.10.0" />
-    <PackageReference Include="FirebirdSql.Data.FirebirdClient" Version="6.6.0" />
+    <PackageReference Include="FirebirdSql.Data.FirebirdClient" Version="8.5.2" />
     <PackageReference Include="Npgsql" Version="4.1.9" />
     <PackageReference Include="MySql.Data" Version="8.0.26" />
   </ItemGroup>