Dependências: windows-sys 0.61

Substitui os PRs #2 e #6 do Dependabot, que foram fechados e não são
recriados. Só o guara-core usa a crate (acesso a dispositivos no
Windows); o Cargo.lock passa a ter menos versões duplicadas.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RRZm8uTVN3WLTwcbrDQAUM

crates/guara-core/Cargo.toml

@@ -34,7 +34,7 @@ argon2 = "0.5"
 libc = "0.2"
 
 [target.'cfg(windows)'.dependencies]
-windows-sys = { version = "0.59", features = ["Win32_Foundation", "Win32_Storage_FileSystem", "Win32_System_IO", "Win32_System_Ioctl", "Win32_Security"] }
+windows-sys = { version = "0.61", features = ["Win32_Foundation", "Win32_Storage_FileSystem", "Win32_System_IO", "Win32_System_Ioctl", "Win32_Security"] }
 
 [dev-dependencies]
 tempfile = "3"