build(deps): bump vmactions/openbsd-vm from 1.2.4 to 1.3.8 (prometheus#3600)

Bumps [vmactions/openbsd-vm](https://github.com/vmactions/openbsd-vm) from 1.2.4 to 1.3.8.
- [Release notes](https://github.com/vmactions/openbsd-vm/releases)
- [Commits](vmactions/openbsd-vm@7fd5a3e...9004791)

---
updated-dependencies:
- dependency-name: vmactions/openbsd-vm
  dependency-version: 1.3.8
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/bsd.yml

@@ -76,7 +76,7 @@ jobs:
       - name: Checkout the repository
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2
       - name: test-e2e
-        uses: vmactions/openbsd-vm@7fd5a3e251db9d8bdff2f34aae11a43b6be5ad60  # v1.2.4
+        uses: vmactions/openbsd-vm@9004791062e748d95cc87e499e77485f91888ce1  # v1.3.8
         with:
           copyback: false
           envs: 'GO_VERSION GNU_TAR_VERSION'