chore(gitignore): update from the `template-formula` [skip ci]
chore(gitignore): update from the `template-formula` [skip ci]

* Automated using https://github.com/myii/ssf-formula/pull/132

saltstack-formulas/apt-cacher-formula,saltstack-formulas/apt-cacher-formula,saltstack-formulas/apt-cacher-formula