workflows: Skip weekly coco stability tests

These tests are not passing, or being maintained,
so as discussed on the AC meeting, we will skip them
from automatically running until they can be reviewed
and re-worked, so avoid wasting CI cycles.

Signed-off-by: stevenhorsman <steven@uk.ibm.com>

.github/workflows/ci-coco-stability.yaml

@@ -1,7 +1,8 @@
 name: Kata Containers CoCo Stability Tests Weekly
 on:
-  schedule:
-    - cron: '0 0 * * 0'
+  # Note: This workload is not currently maintained, so skipping it's scheduled runs
+  # schedule:
+  #   - cron: '0 0 * * 0'
   workflow_dispatch:
 
 concurrency: