Fix typo in README.md

Author: amacati

README.md

@@ -4,7 +4,7 @@
 
 ---
 
-Drone controllers @ LSY. Contains arrayAPI (i.e., NumPy, JAX, Torch...) implementations for various onboard drone controllers.
+Drone controllers @ LSY. Contains array API (i.e., NumPy, JAX, Torch...) implementations for various onboard drone controllers.
 
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