refactor: use better colors for the publish command

Switches the background color of the publish
command's package announcement to a better
looking color. Will possibly change the design
of the command's UI in the future.

src/cli/commands/publish.rs

@@ -92,7 +92,7 @@ impl PublishCommand {
 				manifest.name, manifest.target
 			))
 			.bold()
-			.on_black()
+			.on_color256(235)
 		);
 
 		if manifest.private {