synctiles: silence spurious warning with current flake8-bugbear

We aren't rethrowing the BaseException because we're returning it to a
different thread instead.

Signed-off-by: Benjamin Gilbert <[email protected]>

demo/_synctiles.py

@@ -309,7 +309,7 @@ def sync(self) -> PurePath | BaseException:
                     ContentType=f'image/{FORMAT}',
                 )
             return self.key_name
-        except BaseException as e:
+        except BaseException as e:  # noqa: B036
             return e
 
     @classmethod