LGPL-3.0-or-later wrongly identified as GPL-2.0-or-later

### Description

I was scanning https://gitlab.com/tango-controls/pytango for a demo and noticed that the [following text](https://gitlab.com/tango-controls/pytango/-/blob/develop/tango/asyncio_executor.py?ref_type=heads#L7-L8) gets identified as `GPL-2.0-or-later`:

```py
# -----------------------------------------------------------------------------
# This file is part of PyTango (http://pytango.rtfd.io)
#
# Copyright 2006-2012 CELLS / ALBA Synchrotron, Bellaterra, Spain
# Copyright 2013-2014 European Synchrotron Radiation Facility, Grenoble, France
#
# Distributed under the terms of the GNU Lesser General Public License,
# either version 3 of the License, or (at your option) any later version.
# See LICENSE.txt for more info.
# -----------------------------------------------------------------------------
```

… while it seems pretty clear to be `LGPL-3.0-or-later` instead.

### How To Reproduce

tested with ScanCode-toolkit: v32.2.1 (both in CLI and through ScanCode.io)

```sh
scancode . --info --license --copyright --spdx-tv pytango.spdx
```

… and check the output

---

P.S. Happy to provide more useful bug reports on license mismatches, if there is a better way to do that.