Document OnConfiguring options in EF Core setup

docs/en/framework/data/entity-framework-core/index.md

@@ -146,7 +146,7 @@ Configure<AbpDbContextOptions>(options =>
 });
 ````
 
-Add actions for the `ConfigureConventions` and `OnModelCreating` methods of the `DbContext` as shown below:
+Add actions for the `ConfigureConventions`, `OnModelCreating` and `OnConfiguring` methods of the `DbContext` as shown below:
 
 ````csharp
 Configure<AbpDbContextOptions>(options =>
@@ -170,6 +170,15 @@ Configure<AbpDbContextOptions>(options =>
     {
         // This action is called for OnModelCreating method of specific DbContext.
     });
+
+    options.ConfigureDefaultOnConfiguring((dbContext, optionsBuilder) =>
+    {
+        // This action is called for OnConfiguring method of all DbContexts.
+    });
+    options.ConfigureOnConfiguring<YourDbContext>((dbContext, optionsBuilder) =>
+    {
+        // This action is called for OnConfiguring method of specific DbContext.
+    });
 });
 ````