chore: Switch to gender neutral terms (#19460)

* Switch to gender neutral terms

* Update countries.md

Co-authored-by: inclusive-coding-bot <inclusive-coding-bot@github.com>

tests/integration_tests/druid_tests.py

@@ -290,7 +290,7 @@ def check():
             .one()
         )
         # columns and metrics are not deleted if config is changed as
-        # user could define his own dimensions / metrics and want to keep them
+        # user could define their own dimensions / metrics and want to keep them
         assert set([c.column_name for c in druid_ds.columns]) == set(
             ["affiliate_id", "campaign", "first_seen", "second_seen"]
         )

tests/integration_tests/queries/api_tests.py

@@ -210,7 +210,7 @@ def test_get_query_no_data_access(self):
             get_example_database().id, gamma2.id, gamma2_client_id
         )
 
-        # Gamma1 user, only sees his own queries
+        # Gamma1 user, only sees their own queries
         self.login(username="gamma_1", password="password")
         uri = f"api/v1/query/{query_gamma2.id}"
         rv = self.client.get(uri)
@@ -219,7 +219,7 @@ def test_get_query_no_data_access(self):
         rv = self.client.get(uri)
         self.assertEqual(rv.status_code, 200)
 
-        # Gamma2 user, only sees his own queries
+        # Gamma2 user, only sees their own queries
         self.logout()
         self.login(username="gamma_2", password="password")
         uri = f"api/v1/query/{query_gamma1.id}"