chore(workflows): pin actions/checkout action vv2.4.0

| datasource  | package          | from   | to     |
| ----------- | ---------------- | ------ | ------ |
| github-tags | actions/checkout | v2.3.4 | v2.4.0 |
| github-tags | actions/checkout | v2.3.4 | v2.4.0 |
| github-tags | actions/checkout | v2.3.4 | v2.4.0 |
| github-tags | actions/checkout | v2.3.4 | v2.4.0 |

.github/workflows/code.yaml

@@ -32,7 +32,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout git repository
-        uses: actions/checkout@v2.3.4
+        uses: actions/checkout@v2.4.0
       - name: Install yarn dependencies
         run: yarn install --frozen-lockfile
       - name: Lint code
@@ -47,7 +47,7 @@ jobs:
     needs: test
     steps:
       - name: Checkout git repository
-        uses: actions/checkout@v2.3.4
+        uses: actions/checkout@v2.4.0
       - name: Clean old release drafts
         run: hub release -f "%T (%S) %n" --include-drafts | grep " (draft)" | awk '{print $1}' | xargs --no-run-if-empty -t -n1 hub release delete
         env:

.github/workflows/publish.yaml

@@ -6,7 +6,7 @@ jobs:
   publish-npm:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2.3.4
+      - uses: actions/checkout@v2.4.0
       - name: Set release version
         id: vars
         run: echo ::set-output name=tag::$(echo ${{ github.event.release.tag_name }} | cut -d "v" -f 2)
@@ -28,7 +28,7 @@ jobs:
   publish-github:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2.3.4
+      - uses: actions/checkout@v2.4.0
       - name: Set release version
         id: vars
         run: echo ::set-output name=tag::$(echo ${{ github.event.release.tag_name }} | cut -d "v" -f 2)