build(deps): bump vmactions/solaris-vm from 1.2.3 to 1.2.6

Bumps [vmactions/solaris-vm](https://github.com/vmactions/solaris-vm) from 1.2.3 to 1.2.6.
- [Release notes](https://github.com/vmactions/solaris-vm/releases)
- [Commits](vmactions/solaris-vm@v1.2.3...v1.2.6)

---
updated-dependencies:
- dependency-name: vmactions/solaris-vm
  dependency-version: 1.2.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -281,7 +281,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - name: test on Solaris
-        uses: vmactions/solaris-vm@v1.2.3
+        uses: vmactions/solaris-vm@v1.2.6
         if: contains(matrix.target, 'solaris')
         with:
           release: "11.4-gcc"