fix: update default value specification

Signed-off-by: Bart Jaskulski <bjaskulski@protonmail.com>

gitlab-ci-1.2.yml

@@ -13,8 +13,8 @@ variables:
   MINIMAL_WP_TESTED_UP: "6.2"
   MINIMAL_WC_TESTED_UP: "8.1"
   DEMO_DEPLOY_TARGETS:
-    value: "demo.wpdesk.org,demo.wpdesk.pl"
-    description: "Override this variable in project's .gitlab-ci.yml to support other servers. List supported targets separated by `,`. You may also use short name for deploy target, like \"wpdesk,octolize\" to support both wpdesk and both octolize targets. Currently supported targets: demo.wpdesk.org, demo.wpdesk.pl, demo.octolize.com, stage.demo.octolize.com, demo.flexibleinvoices."
+    value: "/(demo.wpdesk.org|demo.wpdesk.pl)/"
+    description: "Override this variable in project's .gitlab-ci.yml to support other servers. List supported targets in a regexg expression. To support all possible targets just use \"/.*/\". Currently supported targets: demo.wpdesk.org, demo.wpdesk.pl, demo.octolize.com, stage.demo.octolize.com, demo.flexibleinvoices."
 
 stages:
   - prepare-vendor
@@ -28,7 +28,7 @@ stages:
 
 include:
   - project: 'wpdesk/gitlab-ci'
-    ref: 'feat/demo-deploy'
+    ref: 'master'
     file:
       - '/includes/prepare.yml'
       - '/includes/translations.yml'