3.8.1 (stable) 2026-05-17

Documentation:

- MSVC_NMake/MSVC-Builds.md: Mention Visual Studio 2026
  (Chun-wei Fan) Pull request #116
- Visual Studio builds: Update build information
  (Chun-wei Fan) Pull request #118

Meson build:

- NMake Makefiles: Update for Visual Studio 2026
  (Chun-wei Fan) Pull request #116
- NMake Makefiles: Clean up and make things more flexible
- NMake Makefiles: Make build process more robust
  (Chun-wei Fan) Pull request #118