NEWS.md: fix Markdown syntax

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 82.84%. Comparing base (622b233) to head (4793c97). Report is 15 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #391 +/- ## ========================================== + Coverage 78.96% 82.84% +3.87% ========================================== Files 17 12 -5 Lines 2054 1784 -270 ========================================== - Hits 1622 1478 -144 + Misses 432 306 -126 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[timholy]

Thanks!