release-process: minor clarifications and cleanup

[sashko]

• Added reminder to update the copyright year before the release
• Added meta-arp to released layers
• Fixed link to releases page
• Minor styling fixes

Signed-off-by: Oleksandr Kravchuk oleksandr.kravchuk@pelagicore.com

[TSAnsari]

Spelling mistake in commit message "instruictions"