Switch back to 24.06 branch for pandas tests (#15543)

This PR switches the `custom-build` shared workflow branch back to `branch-24.06` which now contains the necessary upload artifact changes.

Authors:
   - GALI PREM SAGAR (https://github.com/galipremsagar)

Approvers:
   - AJ Schmidt (https://github.com/ajschmidt8)

.github/workflows/pr.yaml

@@ -182,7 +182,7 @@ jobs:
   pandas-tests-diff:
     # diff the results of running the Pandas unit tests and publish a job summary
     needs: pandas-tests
-    uses: rapidsai/shared-workflows/.github/workflows/custom-job.yaml@patch-1
+    uses: rapidsai/shared-workflows/.github/workflows/custom-job.yaml@branch-24.06
     with:
         node_type: cpu4
         build_type: pull-request