Small sentence change in blog post (#547)

website/blog/2017-12-14-introducing-docusaurus.md

@@ -14,7 +14,7 @@ We created [Docusaurus](https://docusaurus.io) for the following reasons:
 1. To put the focus on writing good documentation instead of worrying about the infrastructure of a website.
 1. To provide features that many of our open source websites need like blog support, search and versioning.
 1. To make it easy to push updates, new features, and bug fixes to everyone all at once.
-1. And, finally, to provide a consistent look and feel across our all our open source projects.
+1. And, finally, to provide a consistent look and feel across all of our open source projects.
 
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