refactor(constants): simplify BOUNCE_THRESHOLD parsing

`parseInt(undefined, 10)` returns NaN and the `|| 1` fallback already
covers it, so the `|| '1'` default was redundant.

src/lib/constants.ts

@@ -1,8 +1,5 @@
 export const CURRENT_VERSION = process.env.currentVersion;
-export const BOUNCE_THRESHOLD = Math.max(
-  1,
-  Number.parseInt(process.env.BOUNCE_THRESHOLD || '1', 10) || 1,
-);
+export const BOUNCE_THRESHOLD = Math.max(1, Number.parseInt(process.env.BOUNCE_THRESHOLD, 10) || 1);
 export const AUTH_TOKEN = 'umami.auth';
 export const LOCALE_CONFIG = 'umami.locale';
 export const TIMEZONE_CONFIG = 'umami.timezone';