[gha] Bump open-edge-platform/orch-ci/.github/workflows/post-merge.yml from dfa4b9751dcaaa8207662fb43de90742b024210b to 70798ccece8a5856e220f1a6c250337628fc658e

[gha] Bump open-edge-platform/orch-ci/.github/workflows/post-merge.yml from dfa4b9751dcaaa8207662fb43de90742b024210b to 70798ccece8a5856e220f1a6c250337628fc658e #1027