Bump actions/checkout from v2.3.2 to v2.3.4 (#22)

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)

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

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

Author: dependabot[bot]

.github/workflows/main.yml

@@ -18,7 +18,7 @@ jobs:
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
     # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-    - uses: actions/checkout@v2.3.2
+    - uses: actions/checkout@v2.3.4
     - name: Install 
       run: npm install
       working-directory: docs

.github/workflows/npm-publish.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v2.3.2
+      uses: actions/checkout@v2.3.4
     - name: Set up Node.js
       uses: actions/setup-node@v2.1.1
       with: