use a real locale in examples/autoinstall.yaml

examples/autoinstall.yaml

@@ -3,7 +3,7 @@ early-commands:
   - echo a
   - sleep 1
   - echo a
-locale: en_UK.UTF-8
+locale: en_GB.UTF-8
 refresh-installer:
   update: yes
   channel: edge

scripts/runtests.sh

@@ -42,7 +42,7 @@ validate
 python3 scripts/check-yaml-fields.py .subiquity/subiquity-curtin-install.conf \
         debconf_selections.subiquity='"eek"'
 python3 scripts/check-yaml-fields.py .subiquity/var/lib/cloud/seed/nocloud-net/user-data \
-        locale='"en_UK.UTF-8"'
+        locale='"en_GB.UTF-8"'
 grep -q 'finish: subiquity/InstallProgress/install/postinstall/install_package1: SUCCESS: installing package1' \
      .subiquity/subiquity-debug.log
 grep -q 'finish: subiquity/InstallProgress/install/postinstall/install_package2: SUCCESS: installing package2' \