Update .pre-commit-config.yaml
Update .pre-commit-config.yaml

Add a pre-commit checker for `.pre-commit-config.yaml`, reorder filters to
be alphabetical, and add in `check-symlinks` and `check-merge-conflict`.

d-grossman/pelops,Lab41/pelops,dave-lab41/pelops,dave-lab41/pelops,d-grossman/pelops,Lab41/pelops