Update README.md

github-activity-widget/README.md

@@ -2,6 +2,9 @@
 
 Widget shows recent activities on GitHub. It is very similar to the GitHub's "All activity" feed on the main page:
 
+<p align="center">
+  <img src="https://github.com/streetturtle/awesome-wm-widgets/raw/master/github-activity-widget/screenshot.png">
+</p>
 ![screenshot](./screenshot.png)
 
 Mouse click on the item opens repo/issue/pr depending on the type of the activity. Mouse click on user's avatar opens user GitHub profile.
@@ -60,4 +63,4 @@ else
             -- and then set
             function() avatar_img:set_image(path_to_avatar) end)
 end
- ```
+ ```