⬆ Bump actions/checkout from 2 to 3.1.0 (#458)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 3.1.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v2...v3.1.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/build-docs.yml

@@ -19,7 +19,7 @@ jobs:
         env:
           GITHUB_CONTEXT: ${{ toJson(github) }}
         run: echo "$GITHUB_CONTEXT"
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3.1.0
       - name: Set up Python
         uses: actions/setup-python@v2
         with:

.github/workflows/latest-changes.yml

@@ -20,7 +20,7 @@ jobs:
   latest-changes:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3.1.0
         with:
           # To allow latest-changes to commit to the main branch
           token: ${{ secrets.ACTIONS_TOKEN }}

.github/workflows/preview-docs.yml

@@ -10,7 +10,7 @@ jobs:
   preview-docs:
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3.1.0
       - name: Download Artifact Docs
         uses: dawidd6/action-download-artifact@v2.24.0
         with:

.github/workflows/publish.yml

@@ -15,7 +15,7 @@ jobs:
   publish:
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3.1.0
       - name: Set up Python
         uses: actions/setup-python@v2
         with:

.github/workflows/test.yml

@@ -22,7 +22,7 @@ jobs:
       fail-fast: false
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3.1.0
       - name: Set up Python
         uses: actions/setup-python@v2
         with: