Fix future clippy lints (#15519)

- suggestions for tersity using helpers

crates/nu-json/src/value.rs

@@ -437,7 +437,7 @@ impl io::Write for WriterFormatter<'_, '_> {
         fn io_error<E>(_: E) -> io::Error {
             // Value does not matter because fmt::Debug and fmt::Display impls
             // below just map it to fmt::Error
-            io::Error::new(io::ErrorKind::Other, "fmt error")
+            io::Error::other("fmt error")
         }
         let s = str::from_utf8(buf).map_err(io_error)?;
         self.inner.write_str(s).map_err(io_error)?;