Build(deps): Bump actions/checkout from 2 to 3

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 3.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2...v3)

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

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

Author: dependabot[bot]

.github/workflows/publish.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Set up Python
       uses: actions/setup-python@v2
       with:

.github/workflows/release.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     if: "!contains(github.event.head_commit.message, 'ci skip') && !contains(github.event.head_commit.message, 'skip ci')"
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Prepare repository
         # Fetch full git history and tags

.github/workflows/testsingularity.yml

@@ -21,7 +21,7 @@ jobs:
           echo "RELEASE_VERSION=v3.7.1" >> $GITHUB_ENV
           echo "NO_ET=TRUE" >> $GITHUB_ENV
       - name: Setup Singularity
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           repository: hpcng/singularity
           ref: 'v3.7.1'
@@ -57,7 +57,7 @@ jobs:
 
 
       - name: Checkout Pydra repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           repository: ${{ github.repository }}
       - name: Install pydra (test)

.github/workflows/testslurm.yml

@@ -15,7 +15,7 @@ jobs:
     steps:
     - name: Disable etelemetry
       run: echo "NO_ET=TRUE" >> $GITHUB_ENV
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Pull docker image
       run: |
         docker pull $DOCKER_IMAGE