Fix ruff errors

```
C405 Unnecessary `list` literal (rewrite as a `set` literal)
```

test/integration/test_users.py

@@ -2,7 +2,7 @@
 
 from galaxy_test.driver import integration_util
 
-USER_SUMMARY_KEYS = set(["model_class", "id", "email", "username", "deleted", "active", "last_password_change"])
+USER_SUMMARY_KEYS = {"model_class", "id", "email", "username", "deleted", "active", "last_password_change"}
 
 
 class UsersIntegrationCase(integration_util.IntegrationTestCase):
@@ -57,7 +57,7 @@ class TestExposeUsersIntegration(UsersIntegrationCase):
     expose_user_email = True
 
     # Since we allow to expose user information, all users are returned.
-    expected_limited_user_keys = set(["id", "username", "email"])
+    expected_limited_user_keys = {"id", "username", "email"}
     expected_regular_user_list_count = 3
 
 
@@ -67,7 +67,7 @@ class TestExposeOnlyUserNameIntegration(UsersIntegrationCase):
 
     # When only username is exposed, only that field is returned in the user list.
     # Since we are exposing user information, all users are returned.
-    expected_limited_user_keys = set(["id", "username"])
+    expected_limited_user_keys = {"id", "username"}
     expected_regular_user_list_count = 3
 
 
@@ -77,7 +77,7 @@ class TestExposeOnlyUserEmailIntegration(UsersIntegrationCase):
 
     # When only email is exposed, only that field is returned in the user list.
     # Since we are exposing user information, all users are returned.
-    expected_limited_user_keys = set(["id", "email"])
+    expected_limited_user_keys = {"id", "email"}
     expected_regular_user_list_count = 3