Fix typo in README.md

Author: DraViGen

README.md

@@ -4,7 +4,7 @@ WIP Addon
 
 This addon allow you configure which biome you want (or don't want) to spawn into, and also let you increase the searching range.
 
-Add a way a specify a single biome you want to spawn in (doesn't 100% work)
+Add a way to specify a single biome you want to spawn in (doesn't 100% work)
 
 **Everything get configured in the config file created on first launch.**