fix : image link issue fixed in README.md

Author: sadrasabouri

README.md

@@ -2,12 +2,12 @@
 :dollar: Web Server Application For Mafia Game Playing On Local Network
 
 # Roles
-| Role            | image(s)                                                                                                       |
-| :-------------: |:---------------------------------------------------------------------------------------------------:           |
-|      Don        | <img src="https://raw.githubusercontent.com/sadrasabouri/mafia/master/static/images/roles/Don.png">
-|     Doctor      | <img src="https://raw.githubusercontent.com/sadrasabouri/mafia/master/static/images/roles/Doctor_1.png">       |
-                    <img src="https://raw.githubusercontent.com/sadrasabouri/mafia/master/static/images/roles/Doctor_2.png">       |
-|     Resident    | <img src="https://raw.githubusercontent.com/sadrasabouri/mafia/master/static/images/roles/Resident_1.png">     |
+| Role            | image(s)                                                                                                                                |
+| :-------------: |:----------------------------------------------------------------------------------------------------------------------------:           |
+|      Don        | <img width="500" height="500" src="https://raw.githubusercontent.com/sadrasabouri/mafia/master/static/images/roles/Don.png">            |
+|     Doctor      | <img width="500" height="500" src="https://raw.githubusercontent.com/sadrasabouri/mafia/master/static/images/roles/Doctor_1.png">
+                    <img width="500" height="500" src="https://raw.githubusercontent.com/sadrasabouri/mafia/master/static/images/roles/Doctor_2.png">       |
+|     Resident    | <img width="500" height="500" src="https://raw.githubusercontent.com/sadrasabouri/mafia/master/static/images/roles/Resident_1.png">     |
 
 # References
 Icons made by <a href="https://www.flaticon.com/authors/vectors-market" title="Vectors Market">Vectors Market</a> from <a href="https://www.flaticon.com/" title="Flaticon"> www.flaticon.com</a>