home: wm: i3: use explicit path to bar config

The v0.30.0 is about to change how it resolves the configuration path,
so make it explicit to ease the transition and simplify later.

home/wm/i3/default.nix

@@ -80,7 +80,7 @@ in
           in
           [
             {
-              statusCommand = "${i3status-rs} ${barConfigPath}";
+              statusCommand = "${i3status-rs} ~/${barConfigPath}";
               trayOutput = "primary";
               position = "top";