Pull ZynthianOS from default branch as bullseye changes are merged now

.gitlab-ci.yml

@@ -38,7 +38,7 @@ build-zynthbox-image-armhf:
     # Clone repositories required to generate image
     - echo "# Clone repositories required to generate image"
     - git clone https://github.com/zynthbox/CustomPiOS.git
-    - git clone https://github.com/zynthbox/ZynthianOS.git -b dev-bullseye
+    - git clone https://github.com/zynthbox/ZynthianOS.git
 
     # Setup Zynthbox Repo sourceline
     - echo "# Setup Zynthbox Repo sourceline"