Update README.md (algorithm-archivists#300)

Author: Mukundan314

README.md

@@ -15,7 +15,7 @@ and live coded on Twitch: https://www.twitch.tv/simuleios.
 If you would like to communicate more directly, please feel free to go to our discord: https://discord.gg/Pr2E9S6.
 
 
-Note that the this project is is essentially a book about algorithms collaboratively written by an online community.
+Note that the this project is essentially a book about algorithms collaboratively written by an online community.
 Fortunately, there are a lot of algorithms out there, which means that there is a lot of content material available.
 Unfortunately, this means that we will probably never cover every algorithm ever created and instead need to focus on what the community sees as useful and necessary.
 That said, we'll still cover a few algorithms for fun that have very little, if any practical purpose.