[Bug] [LocalFile] the localFile sink always write 'txt' when file_format is not 'txt'

[codering]

Search before asking

• I had searched in the issues and found no similar issues.

What happened

I want to write data to local parquet file. but file suffix is always '.txt' , not '.parquet' when I set file_format to 'parquet'
.

SeaTunnel Version

2.3.2

SeaTunnel Config

sink {
  LocalFile {
    path = "/tmp/seatunnel"
    file_format = "parquet"
    field_delimiter = ","
    sink_columns = ["name","age"]
  }
}

Running Command

./bin/seatunnel.sh --config ./config/v2.batch.config.template -e local

Error Exception

filename suffix is wrong .

Flink or Spark Version

No response

Java or Scala Version

java 1.8

Screenshots

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct

[lightzhao]

Use the key of file_format_type, the document is wrong.

[github-actions]

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