1.0.7: License-File missing from sdist metadata

[mtelka]

The License-File entry is missing from sdist metadata in 1.0.7 and so it is harder to find the actual license wording. This is regression from 1.0.6:

$ wget https://files.pythonhosted.org/packages/source/h/httpcore/httpcore-1.0.6.tar.gz
$ gtar xf httpcore-1.0.6.tar.gz
$ wget https://files.pythonhosted.org/packages/source/h/httpcore/httpcore-1.0.7.tar.gz
$ gtar xf httpcore-1.0.7.tar.gz
$ diff httpcore-1.0.6/PKG-INFO httpcore-1.0.7/PKG-INFO 
3c3
< Version: 1.0.6
---
> Version: 1.0.7
9,10c9
< License-Expression: BSD-3-Clause
< License-File: LICENSE.md
---
> License: BSD-3-Clause
154a154,157
> 
> ## Version 1.0.7 (November 15th, 2024)
> 
> - Support `proxy=…` configuration on `ConnectionPool()`. (#974)
$