chore(deps): update actions/checkout requirement to v2.3.4 (#536)

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/5a4ac9002d0be2fb38bd78e4b4dbde5606d7042f)

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

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

.github/workflows/release.yml

@@ -19,7 +19,7 @@ jobs:
           node-version: ${{ env.NODE_VERSION }}
 
       # full checkout for semantic-release
-      - uses: actions/checkout@v2.3.3
+      - uses: actions/checkout@v2.3.4
         with:
           fetch-depth: 0
           persist-credentials: false

.github/workflows/tests.yml

@@ -24,7 +24,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
 
       - name: Setup PHP
         uses: shivammathur/setup-php@v2