Fix Github Actions setup to install Django after Wagtail
Fix Github Actions setup to install Django after Wagtail

This way, if the Django version is outside Wagtail's supported range (e.g. we're testing against Django's git main), it won't get silently downgraded.

mixxorz/wagtail,jnns/wagtail,wagtail/wagtail,zerolab/wagtail,wagtail/wagtail,thenewguy/wagtail,mixxorz/wagtail,jnns/wagtail,rsalmaso/wagtail,zerolab/wagtail,mixxorz/wagtail,jnns/wagtail,wagtail/wagtail,zerolab/wagtail,jnns/wagtail,mixxorz/wagtail,rsalmaso/wagtail,wagtail/wagtail,wagtail/wagtail,rsalmaso/wagtail,thenewguy/wagtail,zerolab/wagtail,thenewguy/wagtail,rsalmaso/wagtail,rsalmaso/wagtail,thenewguy/wagtail,zerolab/wagtail,mixxorz/wagtail,thenewguy/wagtail