Update to checkout V3

[softwaregravy]

Update to use actions/checkout@v3

Resolves #116

[softwaregravy]

I have tested this in my project with the following:

name: clang-format Check
on: [push]
jobs:
  formatting-check:
    name: Formatting Check
    runs-on: ubuntu-latest
    strategy:
      matrix:
        path:
          - 'src'
          - 'include'
    steps:
    - uses: actions/checkout@v3
    - name: Run clang-format style check for C/C++/Protobuf programs.
      uses: jidicula/[email protected]
      with:
        clang-format-version: '14'
        check-path: ${{ matrix.path }}

[softwaregravy]

Fixes #116

[jidicula]

Thank you for your contribution!