github-actions: bump vmactions/freebsd-vm from 1.5.5 to 1.5.8

Bumps [vmactions/freebsd-vm](https://github.com/vmactions/freebsd-vm) from 1.5.5 to 1.5.8.
- [Release notes](https://github.com/vmactions/freebsd-vm/releases)
- [Commits](f0552d3b69...a2f9a41fa9)

---
updated-dependencies:
- dependency-name: vmactions/freebsd-vm
  dependency-version: 1.5.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/builds.yml

@@ -3517,7 +3517,7 @@ jobs:
         with:
           name: prep
           path: prep
-      - uses: vmactions/freebsd-vm@f0552d3b69211736abd97f02ff3d4674c56b73b1
+      - uses: vmactions/freebsd-vm@a2f9a41fa97f6848b8c3b791087dfcdaa5b473ff
         with:
           release: "15.0"
           arch: x86_64