Fix failing link in README

Author: voxpelli

README.md

@@ -85,4 +85,4 @@ Then add a `.eslintrc` with the following:
 * :warning: [`node/no-process-env`](https://github.com/mysticatea/eslint-plugin-node/blob/master/docs/rules/no-process-env.md)
 * :stop_sign: [`node/no-sync`](https://github.com/mysticatea/eslint-plugin-node/blob/master/docs/rules/no-sync.md)
 
-* :stop_sign: [`promise/prefer-await-to-then`](hhttps://github.com/xjamundx/eslint-plugin-promise/blob/development/docs/rules/prefer-await-to-then.md)
+* :stop_sign: [`promise/prefer-await-to-then`](https://github.com/xjamundx/eslint-plugin-promise/blob/development/docs/rules/prefer-await-to-then.md)