Update README.md

Author: zvone187

README.md

@@ -18,7 +18,7 @@ To install Pythagora run:
 ```bash
 npm i pythagora --save-dev
 ```
-Then, [add your API key](#-config) and you're ready to get tests generated. After that, just run the following command from the root directory of your repo:
+Then, [add your API key](#%EF%B8%8F-config) and you're ready to get tests generated. After that, just run the following command from the root directory of your repo:
 
 ```bash
 npx pythagora --unit-tests --func <FUNCTION_NAME>