Bump actions/checkout from 3 to 4 (#525)

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Noah Gibbs <[email protected]>

.github/workflows/build-docs.yml

@@ -28,7 +28,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install dependencies
         run: sudo apt-get update && sudo apt-get -y install portaudio19-dev libgtk-3-dev libwebkit2gtk-4.0-dev
       - name: Setup Ruby

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Install dependencies
         run: brew install pkg-config portaudio
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Setup Ruby and install gems
         uses: ruby/setup-ruby@v1
         with:
@@ -44,7 +44,7 @@ jobs:
   #     - name: Install dependencies
   #       run: brew install pkg-config portaudio
   #     - name: Checkout code
-  #       uses: actions/checkout@v3
+  #       uses: actions/checkout@v4
   #     - name: Setup Ruby and install gems
   #       uses: ruby/setup-ruby@v1
   #       with: