Update instructions.md

Fix typo in test

Author: carlos-esquivel-gs

react/misterious-api/instructions.md

@@ -1,4 +1,4 @@
-# Misterious API
+# Mysterious API
 To complete this code challenge, you need to be able to run Docker in your local machine. Everything should be clear from this file, however if you have any questions, please refer them to your Hiring Manager.
 
 ## Description
@@ -11,4 +11,4 @@ Execute the command `docker run -d --name interview-api -p 3000:3000 chaseadams/
 
 1. Build a proxy API that consumes this original API Docker container and gracefully handles any upstream intermittent failures.
 2. Provide application-level caching for your proxy.
-3. Dockerise your proxy.
+3. Dockerise your proxy.