[Docs] Fix howto/short_lived_entities.md for manually clearing entiti…

…es (#4268)

### What
I think there might be a typo in the docs. A particular line needs to be
moved above a comment.
Feel free to close the PR if that is not the case.

docs/content/howto/short-lived-entities.md

@@ -86,7 +86,7 @@ rr.set_time_seconds("time", start_time)
 rr.log("short_lived", rr.Tensor(one_second_tensor))
 # Associate the following clear with `start_time + 1.0` on the `time` timeline
 rr.set_time_seconds("time", start_time + 1.0)
+rr.log("short_lived", rr.Clear(recursive=False))  # or `rr.Clear.flat()`
 # Set the time back so other data isn't accidentally logged in the future.
 rr.set_time_seconds("time", start_time)
-rr.log("short_lived", rr.Clear(recursive=False))  # or `rr.Clear.flat()`
 ```