Add timestamp based on the repo name

pkg/appimage/appimagebuild

@@ -4,7 +4,7 @@ PKGNAME='pling-store'
 PKGVER='5.0.1'
 
 # Only timestamp development branches
-if [ "${CI_COMMIT_REF_SLUG}" != "master" ]; then
+if [[ "${CI_PROJECT_NAMESPACE}" == *"development"* ]]; then
   PKGREL=dev-${CI_COMMIT_SHORT_SHA}-$(date +"%Y%m%d-%H%M%S")
 else
   PKGREL='1'