Use gen_random_uuid instead of uuid_generate_v4

docs/examples/users.md

@@ -224,7 +224,7 @@ begin
    where token_type = 'reset'
      and tokens.email = reset_password.email;
 
-  select uuid_generate_v4() into tok;
+  select gen_random_uuid() into tok;
   insert into basic_auth.tokens (token, token_type, email)
          values (tok, 'reset', reset_password.email);
   perform pg_notify('reset',

schema-templates/blog.sql

@@ -97,7 +97,7 @@ basic_auth.send_validation() returns trigger
 declare
   tok uuid;
 begin
-  select uuid_generate_v4() into tok;
+  select gen_random_uuid() into tok;
   insert into basic_auth.tokens (token, token_type, email)
          values (tok, 'validation', new.email);
   perform pg_notify('validate',
@@ -175,7 +175,7 @@ begin
    where token_type = 'reset'
      and tokens.email = request_password_reset.email;
 
-  select uuid_generate_v4() into tok;
+  select gen_random_uuid() into tok;
   insert into basic_auth.tokens (token, token_type, email)
          values (tok, 'reset', request_password_reset.email);
   perform pg_notify('reset',
@@ -215,7 +215,7 @@ begin
    where token_type = 'reset'
      and tokens.email = reset_password.email;
 
-  select uuid_generate_v4() into tok;
+  select gen_random_uuid() into tok;
   insert into basic_auth.tokens (token, token_type, email)
          values (tok, 'reset', reset_password.email);
   perform pg_notify('reset',