chore(deps): update dependency pomelo.entityframeworkcore.mysql to v9

Author: renovate[bot]

backend/DvbLiveBackend/DvbLiveBackend.csproj

@@ -38,7 +38,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="7.0.1" />
-    <PackageReference Include="Pomelo.EntityFrameworkCore.MySql" Version="7.0.0-silver.1" />
+    <PackageReference Include="Pomelo.EntityFrameworkCore.MySql" Version="9.0.0" />
     <PackageReference Include="Sentry.AspNetCore" Version="3.25.0" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="6.4.0" />
   </ItemGroup>