chore(core): bump fs4 (#29611)

The version we relied on was yanked from cargo for some reason 🤷

(cherry picked from commit facb6db)

Author: AgentEnder

Cargo.lock

@@ -55,7 +55,7 @@ mio = "0.8"
 portable-pty = { git = "https://github.com/cammisuli/wezterm", rev = "b538ee29e1e89eeb4832fb35ae095564dce34c29" }
 crossterm = "0.27.0"
 ignore-files = "2.1.0"
-fs4 = "0.10.0"
+fs4 = "0.12.0"
 rusqlite = { version = "0.32.1", features = ["bundled", "array", "vtab"] }
 watchexec = "3.0.1"
 watchexec-events = "2.0.1"