Add upgrade consideration for removal of API v1
Add upgrade consideration for removal of API v1

zerolab/wagtail,thenewguy/wagtail,rsalmaso/wagtail,thenewguy/wagtail,wagtail/wagtail,nimasmi/wagtail,torchbox/wagtail,timorieber/wagtail,thenewguy/wagtail,wagtail/wagtail,jnns/wagtail,kaedroho/wagtail,zerolab/wagtail,gasman/wagtail,FlipperPA/wagtail,rsalmaso/wagtail,mikedingjan/wagtail,timorieber/wagtail,mixxorz/wagtail,rsalmaso/wagtail,FlipperPA/wagtail,timorieber/wagtail,kaedroho/wagtail,zerolab/wagtail,thenewguy/wagtail,gasman/wagtail,takeflight/wagtail,mixxorz/wagtail,gasman/wagtail,kaedroho/wagtail,torchbox/wagtail,gasman/wagtail,mixxorz/wagtail,jnns/wagtail,nealtodd/wagtail,wagtail/wagtail,mixxorz/wagtail,mikedingjan/wagtail,rsalmaso/wagtail,nealtodd/wagtail,takeflight/wagtail,FlipperPA/wagtail,nimasmi/wagtail,jnns/wagtail,mikedingjan/wagtail,kaedroho/wagtail,nimasmi/wagtail,kaedroho/wagtail,wagtail/wagtail,nealtodd/wagtail,zerolab/wagtail,jnns/wagtail,rsalmaso/wagtail,mixxorz/wagtail,takeflight/wagtail,torchbox/wagtail,nimasmi/wagtail,gasman/wagtail,nealtodd/wagtail,FlipperPA/wagtail,timorieber/wagtail,takeflight/wagtail,torchbox/wagtail,wagtail/wagtail,thenewguy/wagtail,mikedingjan/wagtail,zerolab/wagtail