Revert "Version bump for netbootxyz/debian-squash:core-12 new tag 12.0.0-c6bfccaa"

This reverts commit c46b67d8616783126abff1fb89f0ceb0ca195247.

endpoints.yml

@@ -1008,7 +1008,7 @@ endpoints:
     flavor: gnome
     kernel: debian-11-live-kernel
   debian-11-default-squash:
-    path: /debian-squash/releases/download/12.0.0-c6bfccaa/
+    path: /debian-squash/releases/download/11.7.0-bc2052f1/
     files:
     - filesystem.squashfs
     os: debian