Rename `Overload-X.X-win32_x64` release to `Overload-X.X-windows_x64`

[adriengivry]

Problem this feature should fix

• Linux release builds are named: Overload-X.X-linux_x64
• Windows release builds are named: Overload-X.X-win32_x64

Expected solution

For better consistency, we should rename win32_x64 to windows_64 in windows_release.yml