Update .gitlab-ci.yml

.gitlab-ci.yml

@@ -13,10 +13,10 @@ stages:
 
 # UHEI spack version and branch
 variables:
-  SPACK_REPO: https://github.com/electronicvisions/spack
+  SPACK_REPO: https://github.com/spack/spack
   # ebrains_testing contains bug fix for failing uid => username lookup in container
   # (was "visionary")
-  SPACK_REF: ebrains_testing
+  SPACK_REF: develop
 
 generate-pipeline:
   stage: generate