Typo in expected log_format "dynamodb"

[dylanjw]

Invalid setting for dynamodb input plugin:

  input {
    dynamodb {
      # This setting must be a ["plain", "dymamodb", "json_drop_binary", "json_binary_as_text"]
      # Expected one of ["plain", "dymamodb", "json_drop_binary", "json_binary_as_text"], got ["dynamodb"]
      log_format => "dynamodb"

Line 64 of logstash-input-dynamodb/lib/logstash/inputs/dynamodb.rb, should be dynamodb not dymamodb.