Extra long pause test

This code is running just finally locally in tests, but is failing with:

RuntimeError: Task <Task pending name='Task-279' coro=<MessagePump._process_messages() running at /home/runner/work/textual/textual/src/textual/message_pump.py:314>> got Future <Future pending> attached to a different loop

in GitHub Actions. Pretty sure I saw this before, which made me add the
pause in the first place. Given this seems to just be affecting the last
test, from what I can tell, let's make the pause longer to see if that
helps.

I hate chasing action issues...

Author: davep

tests/test_binding_inheritance.py

@@ -598,7 +598,7 @@ async def test_overlapping_priority_bindings() -> None:
     """Test an app stack with overlapping bindings."""
     async with PriorityOverlapApp().run_test() as pilot:
         await pilot.press(*"0abcdef")
-        await pilot.pause(2 / 100)
+        await pilot.pause(5 / 100)
         assert pilot.app.pressed_keys == [
             "widget_0",
             "app_a",