add github contribution chart generator

README.md

@@ -919,6 +919,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Datamuse](https://www.datamuse.com/api/) | Word-finding query engine | No | Yes | Unknown |
 | [Drupal.org](https://www.drupal.org/drupalorg/docs/api) | Drupal.org | No | Yes | Unknown |
 | [Evil Insult Generator](https://evilinsult.com/api) | Evil Insults | No | Yes | Yes |
+| [GitHub Contribution Chart Generator](https://github-contributions.vercel.app) | Create an image of your GitHub contributions | No | Yes | Yes |
 
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 ### Patent