ci(release): remplacer le script Python par sed/awk

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.forgejo/workflows/release.yml

@@ -45,23 +45,17 @@ jobs:
               echo "Pre-release tag — CHANGELOG.md non modifié"
               ;;
             *)
-              cat > /tmp/update_changelog.py << 'PYEOF'
-          import os
+              # Rename [Unreleased] → version header
+              sed -i "s/^## \[Unreleased\]$/## [${current_tag}] — ${today}/" CHANGELOG.md
 
-          version = os.environ['VERSION']
-          today    = os.environ['TODAY']
+              # Insert new empty [Unreleased] section after "# Changelog"
+              sed -i "s/^# Changelog$/# Changelog\n\n## [Unreleased]/" CHANGELOG.md
 
-          with open('CHANGELOG.md', 'r') as f:
-              content = f.read()
-
-          content = content.replace('## [Unreleased]', f'## [{version}] — {today}', 1)
-          content = content.replace('# Changelog\n', '# Changelog\n\n## [Unreleased]\n', 1)
-
-          with open('CHANGELOG.md', 'w') as f:
-              f.write(content)
-          PYEOF
-
-              VERSION="${current_tag}" TODAY="${today}" python3 /tmp/update_changelog.py
+              # Insert reference link before the first existing [vX...] link
+              awk -v tag="${current_tag}" -v url="${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}/releases/tag/${current_tag}" '
+                !inserted && /^\[v/ { print "[" tag "]: " url; inserted=1 }
+                { print }
+              ' CHANGELOG.md > CHANGELOG.tmp && mv CHANGELOG.tmp CHANGELOG.md
 
               git config user.name "CI"
               git config user.email "ci@forge.lclr.dev"