[diffusers-cli] Fix typo in accelerate and transformers versions (huggingface#2154)

Fix typo in accelerate and transformers versions.

Author: pcuenca

src/diffusers/commands/env.py

@@ -53,7 +53,7 @@ def run(self):
         if is_accelerate_available():
             import accelerate
 
-            transformers_version = accelerate.__version__
+            accelerate_version = accelerate.__version__
 
         xformers_version = "not installed"
         if is_xformers_available():