Update Rust crate gtk to ^0.9.0

Author: renovate[bot]

Cargo.toml

@@ -33,7 +33,7 @@ glib = { version = "^0.19.5", features = ["v2_74"] }
 gio = { version = "^0.19.5" }
 pango = { version = "^0.19.5" }
 gdk = { package = "gdk4", version = "^0.8.2", features = ["v4_12"] }
-gtk = { package = "gtk4", version = "^0.8", features = ["v4_12"] }
+gtk = { package = "gtk4", version = "^0.9.0", features = ["v4_12"] }
 adw = { package = "libadwaita", version = "0.6", features = ["v1_4"] }
 vte = { package = "vte4", version = "0.7.1", features = ["v0_70"]}
 rsvg = { package = "librsvg", version = "2.58.0" }