whitelists: update upstream linux branches to ignore

buster is no longer tracked, and currently only debian/bullseye-backports
is used.

Signed-off-by: Dylan Aïssi <dylan.aissi@collabora.com>

data/whitelists.yaml

@@ -54,9 +54,8 @@ whitelists:
   FAILED_PIPELINE_BRANCH_IGNORELIST:
     apertis/v2020: "commits adding d/a/component were not backported, causing the pipeline to fail if re-triggered"
   LINUX_FAILED_PIPELINE_BRANCH_IGNORELIST:
-    debian/buster: "debian/buster not tracked for linux package"
-    debian/buster-backports: "debian/buster-backports not tracked for linux package"
-    debian/buster-security: "debian/buster-security not tracked for linux package"
+    debian/bullseye: "debian/bullseye not tracked for linux package"
+    debian/bullseye-security: "debian/bullseye-security not tracked for linux package"
   LAGGING_VERSION_BRANCH_IGNORELIST:
     apertis/v2020: "commits adding d/a/component are releasing that were not backported"
   UPSTREAM_BRANCH_NOT_MERGED_IGNORELIST: