fix: bump Cargo.toml version to 1.2.3

Cargo.toml was left at 1.2.2 because the version bump sed command
only matched JSON format ("version": "1.2.2") not TOML format
(version = "1.2.2"). This caused CARGO_PKG_VERSION to report 1.2.2
at runtime, triggering the update-available modal on every launch.

cc

src-tauri/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "qbz-nix"
-version = "1.2.2"
+version = "1.2.3"
 description = "Native high-fidelity client for Qobuz™ subscribers on Linux with Hi-Fi audio support (uses the Qobuz API; not certified by Qobuz)"
 authors = ["blitzkriegfc"]
 edition = "2021"