fix: update CI

Author: ezelioli

.gitlab-ci.yml

@@ -5,7 +5,7 @@ init:
   stage: nonfree
   script:
     - git clone git@iis-git.ee.ethz.ch:pulp-restricted/cva6-nonfree.git nonfree
-    - cd nonfree && git checkout b80ad2f05223e3f7c89052bdcb23c18347394fac
+    - cd nonfree && git checkout 906736108fc4c3425fd9a01a9b54a151be768345
   artifacts:
     paths: [ nonfree/ci.yml ]