Fix link to guide locating API Key

closes #54

Author: willbush

README.md

@@ -19,7 +19,7 @@
 ### Prerequisites
 Create the next environment vars in your repository:
 * `TEAMWORK_URI`: The URL of your installation (e.g.: https://yourcompany.teamwork.com)
-* `TEAMWORK_API_TOKEN`: The API token to authenticate the workflow. Follow [this guide](https://developer.teamwork.com/guides/api-key-url/) to find your URL and API key.
+* `TEAMWORK_API_TOKEN`: The API token to authenticate the workflow. Follow [this guide](https://support.teamwork.com/projects/using-teamwork/locating-your-api-key) to find your URL and API key.
 
 **Please Note:** The Teamwork account associated with this API key is the account which these comments will be created under. If this user does not have permission to access the project, this action will be ignored.