Update Copyright 2023

[Fred Friedrich]

Hello,

it seems like the copyright was not updated for a long time :-). Consider this small fix for it:

---
 libbb/appletlib.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libbb/appletlib.c b/libbb/appletlib.c
index d5335d353..bac277aa9 100644
--- a/libbb/appletlib.c
+++ b/libbb/appletlib.c
@@ -780,7 +780,7 @@ int busybox_main(int argc UNUSED_PARAM, char **argv)
                full_write2_str(bb_banner); /* reuse const string */
                full_write2_str(" multi-call binary.\n"); /* reuse */
                full_write2_str(
-                       "BusyBox is copyrighted by many authors between 1998-2015.\n"
+                       "BusyBox is copyrighted by many authors between 1998-2023.\n"
                        "Licensed under GPLv2. See source distribution for detailed\n"
                        "copyright notices.\n"
                        "\n"
-- 
2.39.0