[README] Tweak the usage instruction order.
@@ -179,8 +179,8 @@ In Python, import `compiler_gym` to use the environments:
>>> env = gym.make( # creates a new environment
... "llvm-v0", # selects the compiler to use
... benchmark="cbench-v1/qsort", # selects the program to compile
-... reward_space="IrInstructionCountOz", # selects the optimization target
... observation_space="Autophase", # selects the observation space
+... reward_space="IrInstructionCountOz", # selects the optimization target
... )
>>> env.reset() # starts a new compilation session
>>> env.render() # prints the IR of the program
