ci: update DEBUSINE_ACTION_REF to main

feat/generate-source-package-non-gbp-quilt merged into
qualcomm-linux/debusine-action main. Drop the branch pin and
the associated TODO.

Signed-off-by: Bjordis Collaku <bcollaku@qti.qualcomm.com>

Author: bjordiscollaku

.github/workflows/pkg-build-reusable-workflow.yml

@@ -113,8 +113,7 @@ permissions:
   packages: read
 
 env:
-  # TODO: update to main once feat/generate-source-package-non-gbp-quilt is merged.
-  DEBUSINE_ACTION_REF: feat/generate-source-package-non-gbp-quilt
+  DEBUSINE_ACTION_REF: main
 
 jobs:
   resolve: