Bump actions/checkout from v2.3.2 to v2.3.4 (#20)

Bumps [actions/checkout](https://github.com/actions/checkout) from v2.3.2 to v2.3.4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2.3.2...5a4ac90)

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

Author: dependabot[bot]

.github/workflows/nodejs.yml

@@ -8,7 +8,7 @@ jobs:
         node-version: [10, 12, 14]
         os: [ubuntu-latest, windows-latest, macOS-latest]
     steps:
-    - uses: actions/checkout@v2.3.2
+    - uses: actions/checkout@v2.3.4
     - name: Node.js ${{ matrix.node-version }}
       uses: actions/setup-node@v2.1.2
       with: