Bump actions/checkout from 3 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/coverage_runner.yml

@@ -63,17 +63,17 @@ jobs:
 
       - name: Checkout code for PR
         if: github.event_name == 'pull_request_target'
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           ref: refs/pull/${{ github.event.pull_request.number }}/merge
 
       - name: Checkout repository for push event
         if: github.event_name == 'push'
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Checkout PR coming from community.
         if: github.event_name == 'workflow_dispatch'
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           ref: refs/pull/${{ github.event.inputs.pr_number }}/merge
 
@@ -90,7 +90,7 @@ jobs:
             HAZELCAST_ENTERPRISE_KEY,CN/HZ_LICENSE_KEY
             
       - name: Checkout to certificates
-        uses: actions/checkout@v3
+        uses: actions/checkout@v6
         with:
           repository: hazelcast/private-test-artifacts
           path: certs

.github/workflows/linter_docs_mypy.yaml

@@ -23,7 +23,7 @@ jobs:
           python-version: ${{ needs.python-versions.outputs.latest-python-version }}
 
       - name: Checkout to code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Install dependencies
         run: |
@@ -44,7 +44,7 @@ jobs:
           python-version: ${{ needs.python-versions.outputs.latest-python-version }}
 
       - name: Checkout to code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Install dependencies
         run: |
@@ -66,7 +66,7 @@ jobs:
           python-version: ${{ needs.python-versions.outputs.latest-python-version }}
 
       - name: Checkout to code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Install dependencies
         run: |

.github/workflows/nightly_runner.yml

@@ -29,7 +29,7 @@ jobs:
           distribution: 'temurin'
           java-version: '17'
       - name: Checkout to code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Install dependencies
         run: |
           pip install -r requirements-test.txt

.github/workflows/update_lets_encrypt_certificate.yml

@@ -9,7 +9,7 @@ jobs:
     name: Update Let's Encrypt certificate
     steps:
       - name: Checkout to certificates
-        uses: actions/checkout@v3
+        uses: actions/checkout@v6
         with:
           repository: hazelcast/private-test-artifacts
           path: certs
@@ -20,7 +20,7 @@ jobs:
         run: |
           unzip certs.jar
       - name: Checkout to client
-        uses: actions/checkout@v3
+        uses: actions/checkout@v6
         with:
           repository: hazelcast/hazelcast-python-client
           path: client