Bump actions/checkout from 3 to 4 (#7)

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/deploy.yml

@@ -47,7 +47,7 @@ jobs:
     name: Run hadolint against docker files
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Pull hadolint/hadolint:latest Image
         run: docker pull hadolint/hadolint:latest
       - name: Run hadolint against Dockerfiles

.github/workflows/markdownlint.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Pull markdownlint/markdownlint:latest Image
         run: docker pull markdownlint/markdownlint:latest
       - name: Run markdownlint against *.md files

.github/workflows/on_pr.yml

@@ -26,7 +26,7 @@ jobs:
     runs-on: ubuntu-latest
     if: ${{ github.event_name == 'pull_request' }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Pull koalaman/shellcheck:stable Image
         run: docker pull koalaman/shellcheck:stable
       - name: Run Shellcheck against shell scripts
@@ -37,7 +37,7 @@ jobs:
     runs-on: ubuntu-latest
     if: ${{ github.event_name == 'pull_request' }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Pull hadolint/hadolint:latest Image
         run: docker pull hadolint/hadolint:latest
       - name: Run hadolint against Dockerfiles

.github/workflows/yamllint.yml

@@ -14,7 +14,7 @@ jobs:
     name: Run yamllint against YAML files
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: yaml-lint
         uses: ibiqlik/action-yamllint@v3
         with: