docs: Shorter startup message

[krlmlr]

options(conflicts.policy = list(warn = FALSE))
library(duckplyr)
#> The duckplyr package is configured to fall back to dplyr when it encounters an
#> incompatibility. Fallback events can be collected and uploaded for analysis to
#> guide future development. By default, no data will be collected or uploaded.
#> → Run `duckplyr::fallback_sitrep()` to review the current settings.
#> ✔ Overwriting dplyr methods with duckplyr methods.
#> ℹ Turn off with `duckplyr::methods_restore()`.

^{Created on 2024-07-11 with reprex v2.1.0}