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.yaml

@@ -34,7 +34,7 @@ jobs:
           - KEYCLOAK_VERSION: 21.1.1
           - KEYCLOAK_VERSION: 22.0.0
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
@@ -145,7 +145,7 @@ jobs:
       matrix:
         java: [11, 17]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup java
         uses: actions/setup-java@v3
@@ -177,7 +177,7 @@ jobs:
         env:
           - KEYCLOAK_VERSION: 21.1.1
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup java
         uses: actions/setup-java@v3
@@ -205,7 +205,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Lint .github/workflows/*.yaml files
         uses: ibiqlik/action-yamllint@v3.1