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](actions/checkout@v4...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/buildwheel.yml

@@ -13,7 +13,7 @@ jobs:
         os: [ubuntu-22.04, ubuntu-22.04-arm, windows-2022, macos-13, macos-14]
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - uses: actions/setup-python@v5
         with:
@@ -61,7 +61,7 @@ jobs:
     runs-on: ubuntu-22.04
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - uses: actions/setup-python@v5
         with:
@@ -126,7 +126,7 @@ jobs:
       matrix:
         os: [ubuntu-24.04]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-python@v5
         with:
           python-version: '3.13'
@@ -139,7 +139,7 @@ jobs:
     name: Test docs (build and doctest)
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-python@v5
         with:
           python-version: '3.13'
@@ -154,7 +154,7 @@ jobs:
     name: 'Test old Cython/meson-python'
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-python@v5
         with:
           python-version: '3.13'
@@ -181,7 +181,7 @@ jobs:
         # Supported Flint versions:
         flint-tag: ['v3.0.1', 'v3.1.3-p1', 'v3.2.2', 'v3.3.1']
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-python@v5
         with:
           python-version: '3.13'
@@ -194,7 +194,7 @@ jobs:
     name: Test flint main Linux x86-64
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-python@v5
         with:
           python-version: '3.13'
@@ -208,7 +208,7 @@ jobs:
     name: Test flint main Linux ARM
     runs-on: ubuntu-24.04-arm
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-python@v5
         with:
           python-version: '3.13'
@@ -222,7 +222,7 @@ jobs:
     name: Test coverage setuptools build
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-python@v5
         with:
           python-version: '3.13'
@@ -236,7 +236,7 @@ jobs:
     name: Test coverage meson build
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-python@v5
         with:
           python-version: '3.12' # does not work with 3.13
@@ -254,7 +254,7 @@ jobs:
       matrix:
         sympy-version: ['1.13.1', '1.14.0']
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-python@v5
         with:
           python-version: '3.13'
@@ -270,7 +270,7 @@ jobs:
     name: Test SymPy master
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-python@v5
         with:
           python-version: '3.13'
@@ -353,7 +353,7 @@ jobs:
       contents: write
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Download sdist
         uses: actions/download-artifact@v5

.github/workflows/lint.yml

@@ -9,7 +9,7 @@ jobs:
       matrix:
         python-version: ["3.12"]
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
 
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5