fix: scriptSrc default value

README.md

@@ -87,6 +87,7 @@ this.$metrika.hit(path)
 | id | Your tracking `id` | True | null |
 | router | [Autotracking](#autotracking) if the `router` is passed, otherwise: [manual tracking](#manual-tracking) | False | null |
 | env | API calls are performed only if `env` is "production" | False | development |
+| scriptSrc | Src of metrika script to use | False | https://mc.yandex.ru/metrika/tag.js |
 | debug | If `env` is not "production" and `debug` is true: API calls are replaced by `console.log()` | False | false |
 | ignoreRoutes | List of ignored routes names | False | [] |
 | skipSamePath | Do not track a page visit if previous and next routes URLs match | False | true |