Help-for-release-actions.md

@@ -108,6 +108,10 @@ cd OTB/Utilities/Maintenance
 
 The tool (based on codespell) will identify potential spelling errors and suggest a replacement. The user accepts or refuses those changes (Y/n).
 
+## Copyright update
+
+Ensure that the copyright is up-to-date with the current year. The script `OTB/Utilities/Maintenance/update_copyright_date.sh` updates all files.
+
 ## OTB website
 
 The resources for OTB website are placed in separate folders :