ci(deps): bump actions/checkout from 3 to 4 (#222)

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: Mikhail Gubenko <[email protected]>

.github/workflows/bump-version.yml

@@ -22,7 +22,7 @@ jobs:
           access_token: ${{ github.token }}
 
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           token: ${{ secrets.EMNIFY_GITHUB_ACTIONS_TOKEN }}
 

.github/workflows/documentation.yml

@@ -17,7 +17,7 @@ jobs:
         with:
           access_token: ${{ github.token }}
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Prepare doc-gen
         run: docker build . -f docs/Dockerfile.dev -t emnify/python-sdk-docs

.github/workflows/gitleaks.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: gitleaks
         uses: zricethezav/[email protected]
         with:

.github/workflows/unit-tests.yml

@@ -18,7 +18,7 @@ jobs:
         uses: styfle/[email protected]
         with:
           access_token: ${{ github.token }}
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install dependencies
         run: pip install -r req.txt