[ci skip]Update the documentation about the primary key type

Replace the primary key type `integer` in docs with `bigint`.

ref #26266

1 files changed, 1 insertions, 1 deletions

diff --git a/activerecord/README.rdoc b/activerecord/README.rdoc
index ae53ecd177..ba83a9adb2 100644
--- a/activerecord/README.rdoc
+++ b/activerecord/README.rdoc
@@ -26,7 +26,7 @@ The Product class is automatically mapped to the table named "products",
 which might look like this:
 
    CREATE TABLE products (
-     id int NOT NULL auto_increment,
+     id bigint NOT NULL auto_increment,
      name varchar(255),
      PRIMARY KEY  (id)
    );