Update docs

CHANGELOG

@@ -16,6 +16,7 @@ v 6.0.0
   - Generate fingerprint for ssh keys
   - You an use arrows to navigate at tree view
   - Apply user project limit only for personal projects
+  - API: Allow login with LDAP credentials
 v 5.4.0
   - Ability to edit own comments

doc/api/session.md

@@ -6,10 +6,13 @@ POST /session
 Parameters:
-+ `email` (required) - The email of user
++ `login` (required) - The login of user
++ `email` (required if login missing) - The email of user
 + `password` (required) - Valid password
+__You can login with both GitLab and LDAP credentials now__
+
 ```json
 {
   "id": 1,