sysutils/dua-cli: update to 2.14.6

v2.14.6
-Support for arrow keys as well as Home & End. The help pane was updated to
reflect these changes.
-More readable information on how to delete or trash files in the mark pane.

v2.14.5
-Fix installation via cargo install dua-cli. Please note that it might break
again as it still depends on the unsable clap-3 beta 4. Even when pinning it
breakage is possible as its dependencies itself aren't pinned.

(pin)