[TYPO] Update tweet_metric.py

autoamtic -> automatic

Author: cakiki

examples/tweets/tweet_metric.py

@@ -10,7 +10,7 @@
 valset, devset = devset[:50], devset[50:]
 
 
-# Define the signature for autoamtic assessments.
+# Define the signature for automatic assessments.
 class Assess(dspy.Signature):
     """Assess the quality of a tweet along the specified dimension."""