Merge pull request supabase#6284 from burmecia/docs/local-dev-error

docs/fix error in local dev doc example

Author: kiwicopple

web/docs/guides/local-development.mdx

@@ -143,7 +143,7 @@ Open the Studio, navigate to the "SQL Editor" section, and run the following SQL
 
 ```sql
 create table employees (
-	id serial primary key,
+	id integer primary key generated always as identity,
 	name text
 );
 ```
@@ -154,17 +154,17 @@ Now we have the `employees` table in the local database, but how do we incorpora
 supabase db commit create_employees
 ```
 
-This creates a new migration named `<timestamp>_create_employees.sql`, representing any changes we've made to the local database since `supabase start`.
+This creates a new migration named `supabase/migrations/<timestamp>_create_employees.sql`, representing any changes we've made to the local database since `supabase start`.
 
 Let's add some sample data into the table. We can use the seed script in `supabase/seed.sql`. 
 
 ```sql
 -- in supabase/seed.sql
-insert into employees (id, name) 
+insert into employees (name)
 values 
-  (1, 'Erlich Backman'), 
-  (2, 'Richard Hendricks'),
-  (3, 'Monica Hall');
+  ('Erlich Backman'),
+  ('Richard Hendricks'),
+  ('Monica Hall');
 ```
 
 Now run the following to rerun the migration scripts and the seed script:
@@ -180,7 +180,7 @@ If you look again within Studio, you should now see the contents of `employees`.
 If you run any SQL on the local database that you want to revert, you can use the `reset` command.
 
 ```sql
--- run on local database
+-- run on local database to make a change
 alter table employees 
   add department text default 'Hooli';
 ```