Add release notes for Ketcher v3.8.0, v3.9.0, v3.10.0, v3.11.0 and 3.12.0#169

svvald merged 2 commits intomasterepam/lifescience:masterfrom

ketcher-3.8-3.9-3.10-3.11-3.12-release-notesepam/lifescience:ketcher-3.8-3.9-3.10-3.11-3.12-release-notesCopy head branch name to clipboard