kiss-outdated: use PWD when no args are given (#108)

Co-authored-by: wael <40663@proton.me>
Reviewed-on: https://codeberg.org/kiss-community/kiss/pulls/108
Reviewed-by: phoebos <phoebos@noreply.codeberg.org>
Co-authored-by: sewn <sewn@disroot.org>
Co-committed-by: sewn <sewn@disroot.org>

contrib/kiss-outdated

@@ -382,8 +382,7 @@ get_outdated() {
 main() {
     set -e
 
-    [ "$1" ] ||
-        die 'usage: kiss [ou]tdated /path/to/repo...'
+    [ "$1" ] || set -- "$PWD"
 
     mkdir -p "${tmp:=${XDG_CACHE_HOME:-"$HOME/.cache"}/kiss/repology}"