arrow

MINOR: [R] Import the missing `rlang::quo` function (#14091)

The `rlang::quo` function used in lines added in PR #13786 (d5f80cbe2b2e8801127639b15fd24f829478ea84) but not imported.

```r
mtcars |> arrow::arrow_table() |> dplyr::mutate(dplyr::across(starts_with("c"), as.character)) |> dplyr::collect()
#> Error in quo(!!call2(.x, sym(.y))) : could not find function "quo"
```

Authored-by: SHIMA Tatsuya <ts1s1andn@gmail.com>
Signed-off-by: Neal Richardson <neal.p.richardson@gmail.com>