Bump actions/checkout from 2.4.0 to 3.1.0

Bumps [actions/checkout](https://github.com/actions/checkout) from 2.4.0 to 3.1.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2.4.0...v3.1.0)

---
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-contracts.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Create tag
         id: tag
         uses: butlerlogic/[email protected]
@@ -29,7 +29,7 @@ jobs:
     if: needs.tag.outputs.tag != ''
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Setup Nodejs
         uses: actions/setup-node@v1
         with:

.github/workflows/test.yml

@@ -13,7 +13,7 @@ jobs:
         node-version: [12.x]
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2.4.0
+        uses: actions/checkout@v3
       - uses: actions/[email protected]
         with:
           path: ~/.npm
@@ -39,7 +39,7 @@ jobs:
         node-version: [12.x]
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2.4.0
+        uses: actions/checkout@v3
       - name: Install Node.js ${{ matrix.node-version }}
         uses: actions/[email protected]
         with: