Fix issue reference URL in test docstring (replace XXX with issue number 802)

Agent-Logs-Url: https://github.com/pytest-dev/pytest-bdd/sessions/6e63f920-f1b8-408c-952d-4b688cc32427

Co-authored-by: youtux <778703+youtux@users.noreply.github.com>

Author: Copilot

tests/feature/test_scenario.py

@@ -401,7 +401,7 @@ def test_no_usefixtures_warning_when_no_args(pytester):
     """Test that no PytestWarning about usefixtures() without arguments is emitted
     when scenario functions have no arguments (e.g. when using scenarios()).
 
-    Regression test for https://github.com/pytest-dev/pytest-bdd/issues/XXX
+    Regression test for https://github.com/pytest-dev/pytest-bdd/issues/802
     """
     pytester.makefile(
         ".feature",