docs(cli.rs): add note on debian dependency (#1851)

tooling/cli.rs/src/build/rust.rs

@@ -380,6 +380,7 @@ fn tauri_config_to_bundle_settings(
       depends.push("libappindicator3-1".to_string());
     }
 
+    // provides `libwebkit2gtk-4.0.so.37` and all `4.0` versions have the -37 package name
     depends.push("libwebkit2gtk-4.0-37".to_string());
     depends.push("libgtk-3-0".to_string());
     if manifest.features.contains(&"menu".into()) || system_tray_config.is_some() {