chore(tests): skip flaky test (#104057)

Skip
`tests/sentry/core/endpoints/test_organization_index.py::OrganizationsCreateTest::test_valid_slugs`

Author: mifu67

tests/sentry/core/endpoints/test_organization_index.py

@@ -4,6 +4,7 @@
 from typing import Any
 from unittest.mock import MagicMock, patch
 
+import pytest
 from django.test import override_settings
 from django.urls import reverse
 
@@ -183,6 +184,7 @@ def test_with_default_team_true(self) -> None:
         )
         OrganizationMemberTeam.objects.get(organizationmember_id=org_member.id, team_id=team.id)
 
+    @pytest.mark.skip("flaky: INFRENG-210")
     def test_valid_slugs(self) -> None:
         valid_slugs = ["santry", "downtown-canada", "1234-foo"]
         for input_slug in valid_slugs: