chore: update docs http method

readme.md

@@ -126,9 +126,9 @@ You can fork or edit this source code !
 | ✅       | Leave Group                  | POST   | /group/leave                  |
 | ✅       | Create Group                 | POST   | /group                        |
 | ✅       | Add Participants in Group    | POST   | /group/participants           |
-| ✅       | Remove Participant in Group  | DELETE | /group/participants           |
-| ✅       | Promote Participant in Group | PATCH  | /group/participants/promote   |
-| ✅       | Demote Participant in Group  | PATCH  | /group/participants/demote    |
+| ✅       | Remove Participant in Group  | POST   | /group/participants           |
+| ✅       | Promote Participant in Group | POST   | /group/participants/promote   |
+| ✅       | Demote Participant in Group  | POST   | /group/participants/demote    |
 
 ```
 ✅ = Available