[internal] Further tweak dependabot config (#14132)
[internal] Further tweak dependabot config (#14132)

Remove labels - since it seems they are not desired, see discussion: https://github.com/pantsbuild/pants/pull/14089#issuecomment-1006835891

Also change it to run at a time where GHA CI is mostly idle so those PR don't compete on resources with human generated PRs.
benjyw/pants,pantsbuild/pants,benjyw/pants,benjyw/pants,pantsbuild/pants,benjyw/pants,benjyw/pants,pantsbuild/pants,benjyw/pants,benjyw/pants,pantsbuild/pants,pantsbuild/pants,pantsbuild/pants,pantsbuild/pants