README.md: Fix broken image on GitBook

Add a link of the image to the Readme so that the Image renders correctly on both, the README and the GitBook Fixes #398
coala · Nov 7, 2017 · 0891e8e · 0891e8e
1 parent f207f71
commit 0891e8e
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/README.md b/README.md
@@ -1,4 +1,4 @@
-<p align="center"><img src="screenshots/header.png"></p>
+<p align="center"><img src="https://github.com/coala/projects/blob/master/screenshots/header.png"></p>
 
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