Bump actions/checkout from 3 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/on-push.yml

@@ -18,7 +18,7 @@ jobs:
   pre-commit:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-python@v4
       with:
         python-version: 3.x
@@ -32,7 +32,7 @@ jobs:
         shell: bash -l {0}
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Install Conda environment with Micromamba
       uses: mamba-org/provision-with-micromamba@v16
       with:
@@ -63,7 +63,7 @@ jobs:
         shell: bash -l {0}
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Install Conda environment with Micromamba
       uses: mamba-org/provision-with-micromamba@v16
       with:
@@ -98,7 +98,7 @@ jobs:
         - python-version: '3.10'
           extra: -mindep
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Install Conda environment with Micromamba
       uses: mamba-org/provision-with-micromamba@v16
       with:
@@ -123,7 +123,7 @@ jobs:
     needs: [integration-tests, type-check]
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Build distributions
       run: |
         $CONDA/bin/python -m pip install build