Bump actions/checkout from 2.3.5 to 2.4.0 (cjolowicz#1022)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2.3.5 to 2.4.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2.3.5...v2.4.0)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/docs.yml

@@ -5,7 +5,7 @@ jobs:
     name: Build documentation & check links
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2.3.5
+      - uses: actions/checkout@v2.4.0
       - uses: actions/setup-python@v2.2.2
         with:
           python-version: "3.8"

.github/workflows/labeler.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out the repository
-        uses: actions/checkout@v2.3.5
+        uses: actions/checkout@v2.4.0
 
       - name: Run Labeler
         uses: crazy-max/ghaction-github-labeler@v3.1.1

.github/workflows/pre-commit.yml

@@ -5,7 +5,7 @@ jobs:
     runs-on: ubuntu-latest
     name: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2.3.5
+      - uses: actions/checkout@v2.4.0
       - uses: actions/setup-python@v2.2.2
         with:
           python-version: "3.9"

.github/workflows/reset-instance.yml

@@ -8,11 +8,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out cookiecutter-hypermodern-python
-        uses: actions/checkout@v2.3.5
+        uses: actions/checkout@v2.4.0
         with:
           path: cookiecutter-hypermodern-python
       - name: Check out cookiecutter-hypermodern-python-instance
-        uses: actions/checkout@v2.3.5
+        uses: actions/checkout@v2.4.0
         with:
           repository: "cjolowicz/cookiecutter-hypermodern-python-instance"
           path: cookiecutter-hypermodern-python-instance

.github/workflows/tests.yml

@@ -16,7 +16,7 @@ jobs:
     name: Python ${{ matrix.python-version }} (${{ matrix.os }})
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v2.3.5
+      - uses: actions/checkout@v2.4.0
         with:
           path: cookiecutter-hypermodern-python
       - uses: actions/setup-python@v2.2.2