ci(dependabot): bump actions/checkout from 3 to 4 (#19)

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>

.github/workflows/ci.yml

@@ -25,7 +25,7 @@ jobs:
  runs-on: ubuntu-latest
 
  steps:
- - uses: actions/checkout@v3
+ - uses: actions/checkout@v4
  - uses: actions/setup-python@v4
  with:
  python-version: "3.x"
@@ -41,7 +41,7 @@ jobs:
  os: [ubuntu-latest, macOS-latest, windows-latest]
 
  steps:
- - uses: actions/checkout@v3
+ - uses: actions/checkout@v4
  - name: Set up Python
  uses: actions/setup-python@v4
  with:
@@ -63,7 +63,7 @@ jobs:
  runs-on: ubuntu-latest
 
  steps:
- - uses: actions/checkout@v3
+ - uses: actions/checkout@v4
  - name: Set up Python
  uses: actions/setup-python@v4
  with:
@@ -85,7 +85,7 @@ jobs:
  runs-on: ubuntu-latest
 
  steps:
- - uses: actions/checkout@v3
+ - uses: actions/checkout@v4
  - name: Set up Python
  uses: actions/setup-python@v4
  with:

.github/workflows/docs.yml

@@ -13,7 +13,7 @@ jobs:
  runs-on: ubuntu-latest
 
  steps:
- - uses: actions/checkout@v3
+ - uses: actions/checkout@v4
  - name: Set up Python
  uses: actions/setup-python@v4
  with: