chore(deps): update vmactions/freebsd-vm action to v1.5.6

Author: renovate[bot]

.github/workflows/freebsd.yml

@@ -129,7 +129,7 @@ jobs:
       shell: bash
       run: sudo rm -rf /usr/share/dotnet /usr/local/lib/android &
     - name: Prepare, build and test
-      uses: vmactions/freebsd-vm@v1.3.9
+      uses: vmactions/freebsd-vm@v1.5.6
       with:
         usesh: true
         sync: rsync