update README.md

Author: Nitrino

README.md

@@ -15,8 +15,8 @@
 * Save your changes in order to display the `flatly light` theme
 
 ## Screenshots
-![](https://raw.githubusercontent.com/Nitrino/flatly_light_redmine/master/screenshots/screen_3.png)
+![](https://raw.githubusercontent.com/Nitrino/flatly_light_redmine/master/screenshots/screen_1.png)
 
 ![](https://raw.githubusercontent.com/Nitrino/flatly_light_redmine/master/screenshots/screen_2.png)
 
-![](https://raw.githubusercontent.com/Nitrino/flatly_light_redmine/master/screenshots/screen_1.png)
+![](https://raw.githubusercontent.com/Nitrino/flatly_light_redmine/master/screenshots/screen_3.png)