udpate available api endpoints and rss feed

docs/03-api-and-rss-feeds.md

@@ -1,16 +1,14 @@
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 # RSS feeds and API
 
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 #### Available RSS feeds
 
 1. Latest articles, `/feed/latest/articles/`
 2. Latest articles by subject, `/feed/articles/subject/<subject>/`
 3. Latest articles by category, `/feed/articles/category/<category>/`
-4. Latest clinical trials, `/feed/latest/trials/`
-5. Latest relevant articles by Machine Learning, `/feed/machine-learning/`
-6. Twitter feed,  `/feed/twitter/`. This includes all relevant articles by manual selection and machine learning prediction. It's read by [Zapier](https://zapier.com/) so that we can post on twitter automatically.
+4. Latest articles in open access, `/feed/articles/open/`
+5. Latest clinical trials, `/feed/latest/trials/`
+6. Latest relevant articles by Machine Learning, `/feed/machine-learning/`
+7. Twitter feed,  `/feed/twitter/`. This includes all relevant articles by manual selection and machine learning prediction. It's read by [Zapier](https://zapier.com/) so that we can post on twitter automatically.
 
 ### Available API endpoints
 
@@ -19,6 +17,7 @@
 - Articles By Category https://api.gregory-ms.com/articles/category/{{category}}/
 - Articles By Source https://api.gregory-ms.com/articles/articles/source/{{source}}/
 - Articles By Subject https://api.gregory-ms.com/articles/subject/{{subject}}/
+- Articles with open access https://api.gregory-ms.com/articles/open/
 - Authors http://api.gregory-ms.com/authors/
 - Relevant List https://api.gregory-ms.com/articles/relevant/
 - Sources http://api.gregory-ms.com/sources/