Fixed small typo in README.md

Author: n0toose

README.md

@@ -79,7 +79,7 @@ Supported overlay types:
 There can be any number of mixers. They can take any number of inputs (including the output from another mixer). It can send to any number of outputs. [Read more about mixers.](docs/mixers.md)
 
 ## Project status
-This project is still work in progress, and has not been thoroughly tested or used any any production environments.
+This project is still work in progress, and has not been thoroughly tested or used in any production environments.
 
 ## Installation
 First, install the dependencies, and then clone this repo.