Update README.md

Author: overtrue

README.md

@@ -37,8 +37,8 @@ return [
 
 You can contribute in one of three ways:
 
-1. File bug reports using the [issue tracker](https://github.com/vendor/package/issues).
-2. Answer questions or fix bugs on the [issue tracker](https://github.com/vendor/package/issues).
+1. File bug reports using the [issue tracker](https://github.com/overtrue/laravel-passport-cache-token/issues).
+2. Answer questions or fix bugs on the [issue tracker](https://github.com/overtrue/laravel-passport-cache-token/issues).
 3. Contribute new features or update the wiki.
 
 _The code contribution process is not very formal. You just need to make sure that you follow the PSR-0, PSR-1, and PSR-2 coding guidelines. Any new code contributions must be accompanied by unit tests where applicable._