build(deps): bump actions/checkout from 4 to 5

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 5.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v4...v5)

Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/.github/workflows/check-style.yml b/.github/workflows/check-style.yml
index c052a5d..19a145d 100644
--- a/.github/workflows/check-style.yml
+++ b/.github/workflows/check-style.yml
@@ -20,7 +20,7 @@
       jobname: ClangFormat
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
       with:
         fetch-depth: 0
 
diff --git a/.github/workflows/check-whitespace.yml b/.github/workflows/check-whitespace.yml
index d0a78fc..928fd4c 100644
--- a/.github/workflows/check-whitespace.yml
+++ b/.github/workflows/check-whitespace.yml
@@ -19,7 +19,7 @@
   check-whitespace:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
       with:
         fetch-depth: 0
 
diff --git a/.github/workflows/coverity.yml b/.github/workflows/coverity.yml
index 01a0437..cfa17d3 100644
--- a/.github/workflows/coverity.yml
+++ b/.github/workflows/coverity.yml
@@ -38,7 +38,7 @@
       COVERITY_LANGUAGE: cxx
       COVERITY_PLATFORM: overridden-below
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: install minimal Git for Windows SDK
         if: contains(matrix.os, 'windows')
         uses: git-for-windows/setup-git-for-windows-sdk@v1
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index ea192f6..ea1d959 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -112,7 +112,7 @@
       group: windows-build-${{ github.ref }}
       cancel-in-progress: ${{ needs.ci-config.outputs.skip_concurrent == 'yes' }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - uses: git-for-windows/setup-git-for-windows-sdk@v1
     - name: build
       shell: bash
@@ -173,10 +173,10 @@
       group: vs-build-${{ github.ref }}
       cancel-in-progress: ${{ needs.ci-config.outputs.skip_concurrent == 'yes' }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - uses: git-for-windows/setup-git-for-windows-sdk@v1
     - name: initialize vcpkg
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
       with:
         repository: 'microsoft/vcpkg'
         path: 'compat/vcbuild/vcpkg'
@@ -258,7 +258,7 @@
       group: windows-meson-build-${{ github.ref }}
       cancel-in-progress: ${{ needs.ci-config.outputs.skip_concurrent == 'yes' }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - uses: actions/setup-python@v5
     - name: Set up dependencies
       shell: pwsh
@@ -286,7 +286,7 @@
       group: windows-meson-test-${{ matrix.nr }}-${{ github.ref }}
       cancel-in-progress: ${{ needs.ci-config.outputs.skip_concurrent == 'yes' }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - uses: actions/setup-python@v5
     - name: Set up dependencies
       shell: pwsh
@@ -331,7 +331,7 @@
       TEST_OUTPUT_DIRECTORY: ${{github.workspace}}/t
     runs-on: ${{matrix.vector.pool}}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - run: ci/install-dependencies.sh
     - run: ci/run-build-and-tests.sh
     - name: print test failures
@@ -352,7 +352,7 @@
       CI_JOB_IMAGE: ubuntu-latest
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - run: ci/install-dependencies.sh
     - run: ci/run-build-and-minimal-fuzzers.sh
   dockerized:
@@ -429,7 +429,7 @@
         else
           apt-get -q update && apt-get -q -y install git
         fi
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - run: ci/install-dependencies.sh
     - run: useradd builder --create-home
     - run: chown -R builder .
@@ -454,7 +454,7 @@
       group: static-analysis-${{ github.ref }}
       cancel-in-progress: ${{ needs.ci-config.outputs.skip_concurrent == 'yes' }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - run: ci/install-dependencies.sh
     - run: ci/run-static-analysis.sh
     - run: ci/check-directional-formatting.bash
@@ -469,7 +469,7 @@
       group: sparse-${{ github.ref }}
       cancel-in-progress: ${{ needs.ci-config.outputs.skip_concurrent == 'yes' }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Install other dependencies
       run: ci/install-dependencies.sh
     - run: make sparse
@@ -485,6 +485,6 @@
       CI_JOB_IMAGE: ubuntu-latest
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - run: ci/install-dependencies.sh
     - run: ci/test-documentation.sh