now points fatimage on local branch

Author: wtripp180901

.github/workflows/update-timestamps.yml

@@ -40,7 +40,7 @@ jobs:
   build_fatimage:
     if: "${{ steps.timestamp_check.outputs.timestamps_changed }} == 0"
     needs: upstream_check
-    uses: stackhpc/ansible-slurm-appliance/.github/workflows/fatimage.yml
+    uses: ./.github/workflows/fatimage.yml
 
   ci_and_pr:
     if: "${{ steps.timestamp_check.outputs.timestamps_changed }} == 0"