Update dependency MySql.Data to v8.0.31

Author: renovate[bot]

src/NHibernate.Test/NHibernate.Test.csproj

@@ -67,7 +67,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.0.0" />
     <PackageReference Include="FirebirdSql.Data.FirebirdClient" Version="8.5.2" />
     <PackageReference Include="Npgsql" Version="6.0.6" />
-    <PackageReference Include="MySql.Data" Version="8.0.27" />
+    <PackageReference Include="MySql.Data" Version="8.0.31" />
   </ItemGroup>
   <ItemGroup Condition="$(NhNetFx)">
     <Reference Include="System.Configuration" />