add releases endpoint note (#15)

Author: Philidor Green

README.md

@@ -28,6 +28,7 @@ If you have any questions or concern, please [file an issue](https://github.com/
   - [Commits](Repositories/Commits.md)
   - [Contents](Repositories/Contents.md)
   - [Deploy Keys](Repositories/Deploy%20Keys.md)
+  - [Releases](Repositories/Releases.md)
   - [Webhooks](Repositories/Webhooks.md)
 - [Users](Users)
   - [Emails](Users/Emails.md)

Repositories/Releases.md

@@ -0,0 +1,35 @@
+# Releases
+
+## List Releases
+
+```
+GET /repos/:owner/:repo/releases
+```
+
+### Response
+
+```
+Status: 200 OK
+```
+```json
+[
+  {
+    "id": 1,
+    "tag_name": "sometag",
+    "target_commitish": "master",
+    "name": "awesome-release",
+    "body": "Description of the release",
+    "draft": false,
+    "prerelease": false,
+    "author": {
+      "id": 1,
+      "username": "Author Name",
+      "login": "",
+      "full_name": "",
+      "email":"author@email.com",
+      "avatar_url": ""
+    },
+    "created_at": "2020-03-28T13:38:00+03:00"
+  }
+]
+```