Bump actions/checkout from 3.5.3 to 4.1.1

Bumps [actions/checkout](https://github.com/actions/checkout) from 3.5.3 to 4.1.1.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3.5.3...v4.1.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/dxw-sec-api.yml

@@ -9,7 +9,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3.5.3
+      - uses: actions/checkout@v4.1.1
 
       - uses: shivammathur/[email protected]
         with:

.github/workflows/main.yml

@@ -6,7 +6,7 @@ jobs:
   shellcheck:
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v3.5.3
+      - uses: actions/checkout@v4.1.1
       - run: sudo apt-get update
       - run: sudo apt-get install -y shellcheck
       - run: ./.shellcheck.sh

.github/workflows/theme.yml

@@ -13,7 +13,7 @@ jobs:
       matrix:
         php-versions: ['7.4']
     steps:
-      - uses: actions/checkout@v3.5.3
+      - uses: actions/checkout@v4.1.1
       - name: Setup PHP
         uses: shivammathur/[email protected]
         with: