Fixed exception type

src/Umbraco.Cms.Persistence.EFCore/UmbracoDbContext.cs

@@ -59,7 +59,7 @@ public class UmbracoDbContext : DbContext
 
             // we're throwing an exception here to make it abundantly clear that one should never utilize (or have a
             // dependency on) the DbContext before the connection string has been initialized by the installer.
-            throw new ConfigurationErrorsException("No connection string was found, cannot setup Umbraco EF Core context");
+            throw new InvalidOperationException("No connection string was found, cannot setup Umbraco EF Core context");
         }
 
         IEnumerable<IMigrationProviderSetup> migrationProviders = StaticServiceProvider.Instance.GetServices<IMigrationProviderSetup>();