Skip GitHub Actions on specific commits messages

example.md

Example One.

jobs:
  build:
    name: Build ${{ matrix.os }} - Bash
    runs-on: ${{ matrix.os }}
    if: ${{ !contains(github.event.head_commit.message, '#docs') }}

Example Two.

jobs:
  format:
    runs-on: ubuntu-latest
    if: "! contains(github.event.head_commit.message, 'wip')"