Increase RoundtripResample2 threshold (#482)
Increase RoundtripResample2 threshold (#482)

scalar and arm32 builds produced a sligthly bigger file. This fixes the
failures for scalar and arm32.
libjxl/libjxl,libjxl/libjxl,libjxl/libjxl,libjxl/libjxl,libjxl/libjxl,libjxl/libjxl,libjxl/libjxl,libjxl/libjxl