add contributor name for #8950
add contributor name for #8950

wagtail/wagtail,wagtail/wagtail,zerolab/wagtail,thenewguy/wagtail,wagtail/wagtail,rsalmaso/wagtail,rsalmaso/wagtail,wagtail/wagtail,wagtail/wagtail,thenewguy/wagtail,zerolab/wagtail,zerolab/wagtail,rsalmaso/wagtail,zerolab/wagtail,rsalmaso/wagtail,rsalmaso/wagtail,thenewguy/wagtail,thenewguy/wagtail,zerolab/wagtail,thenewguy/wagtail