build(deps): bump actions/checkout from 5 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...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/ci.yml

@@ -70,7 +70,7 @@ jobs:
           - macos-latest
     runs-on: ${{ matrix.runner }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-java@v5
         with:
           java-version: ${{ env.JAVA_VERSION }}
@@ -124,7 +124,7 @@ jobs:
         JAVA_VERSION: ${{ fromJson(needs.java_matrix.outputs.versions) }}
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-java@v5
         with:
           java-version: ${{ matrix.JAVA_VERSION }}
@@ -150,7 +150,7 @@ jobs:
     needs: [ build ]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up JDK
         uses: actions/setup-java@v5
         with:
@@ -172,7 +172,7 @@ jobs:
     needs: [ build, download_test_data ]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up JDK
         uses: actions/setup-java@v5
         with:
@@ -203,7 +203,7 @@ jobs:
       fail-fast: true
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up JDK
         uses: actions/setup-java@v5
         with:
@@ -257,7 +257,7 @@ jobs:
           - { runner: macos-latest, id: eb-ep, cmd: ./run-eb-tests.sh -100 electronproton }
     runs-on: ${{ matrix.runner }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up JDK
         uses: actions/setup-java@v5
         with:
@@ -286,7 +286,7 @@ jobs:
     needs: [ build ]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up JDK
         uses: actions/setup-java@v5
         with:
@@ -309,7 +309,7 @@ jobs:
     needs: [ build ]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up JDK
         uses: actions/setup-java@v5
         with:
@@ -334,7 +334,7 @@ jobs:
     needs: [ unit_tests ]
     steps:
       ### mkdocs
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: install mkdocs dependencies
         run: python -m pip install -r docs/mkdocs/requirements.txt
       - name: generate mkdocs
@@ -393,7 +393,7 @@ jobs:
       RUN_ID: ${{ github.run_id }}
       TAG_NAME: ${{ github.ref_name }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/download-artifact@v6
         with:
           name: build_ubuntu-latest