v1.5.2

Fixes

• Fix native SSH not working with custom SSH port (#1424, @9547)
• Fix dashboard address displaying issue for tikv-slim clusters (#1428, @iosmanthus)
• Fix a typo in help message of tiup-playground (#1429, @ekexium)
• Fix TiFlash nodes not handled correctly in some commands (#1431, @lucklove)
• Fix jemalloc config for TiKV nodes (#1435, @9547)
• Fix the issue that slow log is not placed under log_dir (#1441, @lucklove)

Improvements

• Update default alertmanager config template to avoid confusing (#1425 #1426, @lucklove)
• Increase default timeout of transferring leader in upgrade progress (#1434, @AstroProfundis)
• Update dependencies (#1433, @AstroProfundis)