Fix sphinx-lint after #31097 and b878b3af (GH-31248)

`main` branch is failing, see https://dev.azure.com/python/cpython/_build/results?buildId=96616&view=logs&j=4db1505a-29e5-5cc0-240b-53a8a2681f75&t=a975920c-8356-5388-147c-613d5fab0171

Logs:

```
PATH=./venv/bin:$PATH sphinx-lint -i tools -i ./venv -i README.rst
No problems found.
PATH=./venv/bin:$PATH sphinx-lint ../Misc/NEWS.d/next/
[1] ../Misc/NEWS.d/next/Library/2022-02-09-00-53-23.[bpo-45863]().zqQXVv.rst:0: No newline at end of file (no-newline-at-end-of-file).
[1] ../Misc/NEWS.d/next/Build/2022-01-19-11-08-32.[bpo-46430]().k403m_.rst:0: No newline at end of file (no-newline-at-end-of-file).
2 problems with severity 1 found.
```

This PR fixes these two problems, so `main` is green again.

Related PR: https://github.com/python/cpython/pull/31097
CC @JulienPalard

Automerge-Triggered-By: GH:JulienPalard