message: Fix typo 'dections'
diff: @@ -120,7 +120,7 @@ class MetadataWriter(metadata_writer.MetadataWriter):
  array of N floating point values between 0 and 1 representing
  probability that a class was detected. Use ClassificationTensorMd to
  calibrate score.
  - output_number_md: output number of dections tensor information. This
  + output_number_md: output number of detections tensor information. This
  tensor is an integer value of N.
  Returns:
  