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] <support@github.com>

.github/workflows/create-conda-envs.yml

@@ -25,7 +25,7 @@ jobs:
         python: [3.7, 3.8, 3.9]
     steps:
       - name: checkout cylc-doc
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: configure python
         uses: actions/setup-python@v4

.github/workflows/deploy.yml

@@ -66,7 +66,7 @@ jobs:
           python-version: '3.9'
 
       - name: checkout cylc-doc
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: ${{ github.event.inputs.cylc-flow-tag }}
           path: docs
@@ -88,7 +88,7 @@ jobs:
           working_directory: ./docs
 
       - name: checkout gh-pages
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: gh-pages
           path: gh-pages

.github/workflows/nightly.yml

@@ -40,7 +40,7 @@ jobs:
           python-version: '3.9'
 
       - name: checkout cylc-doc
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: docs
 
@@ -54,7 +54,7 @@ jobs:
         uses: ./docs/.github/actions/install-libs
 
       - name: checkout gh-pages branch
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: gh-pages
           path: gh-pages

.github/workflows/shortlog.yml

@@ -14,7 +14,7 @@ jobs:
     timeout-minutes: 10
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0  # need to fetch all commits to check contributors
 

.github/workflows/test.yml

@@ -39,7 +39,7 @@ jobs:
             node-version: '16'
 
       - name: checkout cylc-doc
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: install dependencies
         uses: ./.github/actions/install-dependencies

.github/workflows/undeploy.yml

@@ -44,10 +44,10 @@ jobs:
           python-version: '3.9'
 
       - name: checkout cylc-doc
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: checkout gh-pages
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: gh-pages
           path: gh-pages

.github/workflows/update_copyright.yml

@@ -29,7 +29,7 @@ jobs:
     steps:
 
       - name: Checkout repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Configure git
         uses: cylc/release-actions/configure-git@v1