[gha] Bump open-edge-platform/orch-ci/.github/workflows/post-merge.yml (#354)

Bumps [open-edge-platform/orch-ci/.github/workflows/post-merge.yml](https://github.com/open-edge-platform/orch-ci) from 2026.0.2 to 2026.0.4.
- [Commits](open-edge-platform/orch-ci@aca1e7a...c6a01b8)

---
updated-dependencies:
- dependency-name: open-edge-platform/orch-ci/.github/workflows/post-merge.yml
  dependency-version: 2026.0.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]

.github/workflows/post-merge.yml

@@ -18,7 +18,7 @@ jobs:
       contents: read
       security-events: write
       id-token: write
-    uses: open-edge-platform/orch-ci/.github/workflows/post-merge.yml@aca1e7ad41fcb49f5da7cd31cecdca46822b25fa  # yamllint disable-line rule:line-length
+    uses: open-edge-platform/orch-ci/.github/workflows/post-merge.yml@c6a01b803d3c045de1b1b2f788a47eaaefed3f07  # yamllint disable-line rule:line-length
     with:
       run_version_check: true
       run_dep_version_check: false