Update list of supported formats in dfr open error message. (#12408)

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# Description
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The error message when using `dfr open --type` shows an outdated list of
supported formats.

# User-Facing Changes
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User is now informed that jsonl and avro formats are supported.

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Done.

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No doc changes.

crates/nu-cmd-dataframe/src/dataframe/eager/open.rs

@@ -121,7 +121,9 @@ fn command(
             "jsonl" => from_jsonl(engine_state, stack, call),
             "avro" => from_avro(engine_state, stack, call),
             _ => Err(ShellError::FileNotFoundCustom {
-                msg: format!("{msg}. Supported values: csv, tsv, parquet, ipc, arrow, json"),
+                msg: format!(
+                    "{msg}. Supported values: csv, tsv, parquet, ipc, arrow, json, jsonl, avro"
+                ),
                 span: blamed,
             }),
         },