Fix confusing message about "when reading a pin" for pin_write()

[juliasilge]

If you don't include the username when writing a pin to Connect, it gives a confusing message:

library(pins)
board <- board_connect()
#> Connecting to Posit Connect 2023.07.0 at <https://colorado.posit.co/rsc>
board |> pin_write(10:20, "nice-numbers", type = "json")
#> ! Please use full name when reading a pin: "julia.silge/nice-numbers", not "nice-numbers".
#> Writing to pin 'julia.silge/nice-numbers'

^{Created on 2023-09-18 with reprex v2.0.2}

Notice:

when reading a pin

but we were writing! It happens in rsc_content_find(), which is used a lot and not only when reading. Probably should update this message:

pins-r/R/board_connect.R

Line 474 in 1a1e450

cli::cli_alert_warning("Please use full name when reading a pin: {.val {name$full}}, not {.val {name$name}}.")

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