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/1_create_release_pr.yml

@@ -21,7 +21,7 @@ jobs:
         uses: cylc/release-actions/stage-1/sanitize-inputs@v1
 
       - name: Checkout repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: ${{ env.BASE_REF }}
           fetch-depth: 0  # need to fetch all commits to check contributors

.github/workflows/2_auto_publish_release.yml

@@ -22,7 +22,7 @@ jobs:
     steps:
 
     - name: Checkout repo
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         ref: ${{ env.MERGE_SHA }}
 

.github/workflows/bash.yml

@@ -44,7 +44,7 @@ jobs:
           - '5.0'
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Run Docker container
         run: |

.github/workflows/branch_sync.yml

@@ -48,7 +48,7 @@ jobs:
             print(f'SYNC_BRANCH={branch}-sync', file=F)
 
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
           ref: master

.github/workflows/build.yml

@@ -24,7 +24,7 @@ jobs:
             python: '3.7'
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Setup Python
         uses: actions/setup-python@v4

.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_conda-build.yml

@@ -19,7 +19,7 @@ jobs:
     timeout-minutes: 10
     steps:
       - name: checkout cylc-flow
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: build conda env
         run: |

.github/workflows/test_fast.yml

@@ -28,7 +28,7 @@ jobs:
       PYTEST_ADDOPTS: --cov --cov-append -n 5 --color=yes
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Configure Python
         uses: actions/setup-python@v4
@@ -112,7 +112,7 @@ jobs:
     timeout-minutes: 2
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Download coverage artifacts
         uses: actions/download-artifact@v3

.github/workflows/test_functional.yml

@@ -96,7 +96,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Configure Python
         uses: actions/setup-python@v4
@@ -306,7 +306,7 @@ jobs:
     timeout-minutes: 2
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Download coverage artifacts
         uses: actions/download-artifact@v3

.github/workflows/test_manylinux.yml

@@ -38,7 +38,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Configure git  # Needed by the odd test
         uses: cylc/release-actions/configure-git@v1

.github/workflows/test_tutorial_workflow.yml

@@ -31,7 +31,7 @@ jobs:
           python-version: ${{ matrix.python-version }}
 
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install docs/tutorial dependencies
         uses: cylc/cylc-doc/.github/actions/install-dependencies@master

.github/workflows/update_copyright.yml

@@ -12,7 +12,7 @@ jobs:
     steps:
 
     - name: Checkout repo
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Configure git
       uses: cylc/release-actions/configure-git@v1