Update actions/checkout requirement to v2.3.2

Updates the requirements on [actions/checkout](https://github.com/actions/checkout) to permit the latest version.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/commits/2036a08e25fa78bbd946711a407b529a0a1204bf)

Signed-off-by: dependabot[bot] <support@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@v2.3.1
+    - uses: actions/checkout@v2.3.2
     - 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@master
+      uses: actions/checkout@v2.3.2
     - name: Set up Node.js
       uses: actions/setup-node@v2-beta
       with: