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/publish-charts.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-22.04
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: actions/setup-python@v4
         with:

.github/workflows/test-dask-chart.yml

@@ -46,7 +46,7 @@ jobs:
           - k3s-channel: latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Lint chart's templates
         run: helm lint ./dask --strict --values dask/dev-values.yaml

.github/workflows/test-daskhub-chart.yml

@@ -43,7 +43,7 @@ jobs:
           - k3s-channel: latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Update chart dependencies
         run: helm dependencies update ./daskhub

.github/workflows/watch-dependencies.yml

@@ -23,7 +23,7 @@ jobs:
     if: github.repository == 'dask/helm-chart'
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Get latest tag of ghcr.io/dask/dask
         id: latest
@@ -77,7 +77,7 @@ jobs:
     if: github.repository == 'dask/helm-chart'
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Get daskhub/values.yaml pinned tag of pangeo/base-notebook
         id: local
@@ -166,7 +166,7 @@ jobs:
             chart_dep_changelog_url: https://gateway.dask.org/changelog.html
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Get Chart.yaml pinned version of ${{ matrix.chart_dep_name }} chart
         id: local