Bump actions/checkout from 2.3.4 to 2.3.5 (#40)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2.3.4 to 2.3.5.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2.3.4...v2.3.5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

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

.github/workflows/CI.yml

@@ -15,7 +15,7 @@ jobs:
           - "5.2.4"
     steps:
       - name: Checkout
-        uses: actions/checkout@v2.3.4
+        uses: actions/checkout@v2.3.5
       - name: Setup System
         run: |
           sudo apt-get install libsqlite3-dev

.github/workflows/gempush.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2.3.4
+      - uses: actions/checkout@v2.3.5
       - name: Set up Ruby 2.6
         uses: actions/setup-ruby@v1.1.3
         with: