message: Change rustfmt action to run when pushed to any branch
diff: -# When pushed to `master`, run `cargo +nightly fmt --all` and commit any changes.
  +# When pushed, run `cargo +nightly fmt --all` and commit any changes.
  name: rustfmt
  -on:
  - push:
  - branches:
  - - master
  +on: [push]
  jobs:
  rustfmt_nightly:
  runs-on: ubuntu-latest
  