[deps]: Update Pomelo.EntityFrameworkCore.MySql to v9 (#445)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

version-bump/tests/fixtures/test.csproj

@@ -28,7 +28,7 @@
     <PackageReference Include="MongoDB.Driver" Version="[3.0.0]" />
     <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="[9.0.1]" />
     <PackageReference Include="Pkcs11Interop" Version="[5.2.0]" />
-    <PackageReference Include="Pomelo.EntityFrameworkCore.MySql" Version="[8.0.2]" />
+    <PackageReference Include="Pomelo.EntityFrameworkCore.MySql" Version="[9.0.0]" />
     <PackageReference Include="Serilog.AspNetCore" Version="[8.0.3]" />
     <PackageReference Include="Serilog.Settings.Configuration" Version="[8.0.4]" />
     <PackageReference Include="Serilog.Sinks.Console" Version="[6.0.0]" />