🚨(backend) follow Ruff 2024.2 style introduced in v0.3.0

We recently updated Ruff from 0.2.2 to v0.3, which introduced
Ruff 2024.2 style. This new style updated Ruff formatter's behavior,
making our make lint command fails.

Ruff 2024.2 style add a blank line after the module docstring.
Please take a look at Ruff ChangeLog to get more info.

src/backend/core/tests/team_accesses/test_api_team_accesses_create.py

@@ -1,6 +1,7 @@
 """
 Test for team accesses API endpoints in People's core app : create
 """
+
 import random
 
 import pytest

src/backend/core/tests/team_accesses/test_api_team_accesses_delete.py

@@ -1,6 +1,7 @@
 """
 Test for team accesses API endpoints in People's core app : delete
 """
+
 import random
 
 import pytest

src/backend/core/tests/team_accesses/test_api_team_accesses_list.py

@@ -1,6 +1,7 @@
 """
 Test for team accesses API endpoints in People's core app : list
 """
+
 import pytest
 from rest_framework.test import APIClient
 

src/backend/core/tests/team_accesses/test_api_team_accesses_retrieve.py

@@ -1,6 +1,7 @@
 """
 Test for team accesses API endpoints in People's core app : retrieve
 """
+
 import pytest
 from rest_framework.test import APIClient
 

src/backend/core/tests/team_accesses/test_api_team_accesses_update.py

@@ -1,6 +1,7 @@
 """
 Test for team accesses API endpoints in People's core app : update
 """
+
 import random
 from uuid import uuid4