fix: libcosmic api changes

Cargo.lock

@@ -1684,7 +1684,6 @@ dependencies = [
  "udev",
  "upower_dbus",
  "url",
- "ustr",
  "xkb-data",
  "zbus 4.4.0",
  "zbus_polkit",
@@ -7487,18 +7486,6 @@ version = "2.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "daf8dba3b7eb870caf1ddeed7bc9d2a049f3cfdfae7cb521b087cc33ae4c49da"
 
-[[package]]
-name = "ustr"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "18b19e258aa08450f93369cf56dd78063586adf19e92a75b338a800f799a0208"
-dependencies = [
- "ahash 0.8.11",
- "byteorder",
- "lazy_static",
- "parking_lot 0.12.3",
-]
-
 [[package]]
 name = "usvg"
 version = "0.42.0"