fixup! Fix typo.

check_s3_bucket/__init__.py

@@ -100,7 +100,7 @@ def main():
         exit(2)
 
     # Calculate the age of the latest file and if it's in the thresholds set.
-    if files[0]["HoursSinceLastModified"] > NOW:
+    if files[0]["LastModified"] > NOW:
         print("Latest file is from the future, something is wrong.")
         exit(3)
     timedelta = files[0]["HoursSinceLastModified"]