improve .sh file

etc/scripts/set_copyright_year.sh

@@ -10,10 +10,16 @@
 # The script will check the first two lines for a copyright
 # notice (in case the first line is a shebang).
 
+
+
 while read -rd $'\0' year file; do
     # Extract the first year from the copyright notice
     current_year=$(sed -n '1,2s/^\(# Copyright (c) \)\([[:digit:]]\{4,\}\).*/\2/p' "$file")
 
+    # Skip the file if no year is found
+    if [[ -z "$current_year" ]]; then
+        continue
+    fi
 
     if $CHECK_MODE && [[ "$current_year" != "$year" ]]; then
         echo "Error: Copyright year mismatch in file $file. Expected $year, found $current_year."