Bump actions/checkout from 3 to 4

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] <support@github.com>

.github/workflows/ci.yml

@@ -22,7 +22,7 @@ jobs:
               otp-version: 26.0
             lint: lint
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Elixir
       uses: erlef/setup-beam@v1
       with:

.github/workflows/create-release.yml

@@ -14,7 +14,7 @@ jobs:
   check:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - id: version
       run: |
         version=$(sed -n '/version:/s/.*:\s*//p' mix.exs | sed -E 's/(^[^"]*"|"[^"]*$)//g')

.github/workflows/release.yml

@@ -23,7 +23,7 @@ jobs:
               otp-version: 26.0
             lint: lint
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Elixir
       uses: erlef/setup-beam@v1
       with: