ci(vagrant): use pre-salted boxes & conditional local settings [skip ci]

* Automated using https://github.com/myii/ssf-formula/pull/311

.github/workflows/kitchen.vagrant.yml

@@ -14,8 +14,10 @@ jobs:
       fail-fast: false
       matrix:
         instance:
-          - default-freebsd-122-latest-py3
-          - default-freebsd-114-latest-py3
+          - default-freebsd-122-master-py3
+          - default-freebsd-114-master-py3
+          # - default-freebsd-122-3002-6-py3
+          # - default-freebsd-114-3002-6-py3
     steps:
       - name: 'Check out code'
         uses: 'actions/checkout@v2'