Update to v2021pre

Move runtime and SDK to v2021pre.
The suite recipe name should be in sync with the Apertis version.

Signed-off-by: Frédéric Danis <frederic.danis@collabora.com>

.gitlab-ci.yml

@@ -2,7 +2,7 @@
 
 variables:
   FLATDEB_PROJECT_URL: https://gitlab.apertis.org/infrastructure/apertis-flatdeb.git
-  APERTIS_RELEASE: "v2021dev1"
+  APERTIS_RELEASE: "v2021pre"
   upload_host: archive@images.apertis.org
   upload_root_main: /srv/images/public/flatpak
   upload_root_test: /srv/images/test/flatpak/flatdeb-demo/$CI_COMMIT_REF_SLUG

apps/org.apertis.demo.curl.yaml

 ---
 id: org.apertis.demo.curl
-branch: v2021dev1
 runtime: org.apertis.demo.Platform
-runtime-version: v2021dev1
+runtime-version: v2021pre
 sdk: org.apertis.demo.Sdk
 command: curl
 modules: