build(deps): bump actions/checkout from 2 to 2.3.4 (#128)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 2.3.4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v2...v2.3.4)

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

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

.github/workflows/buildx.yml

@@ -21,7 +21,7 @@ jobs:
             platforms: linux/amd64,linux/arm64,linux/ppc64le,linux/s390x,linux/arm/v7,linux/arm/v6
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
 
       - name: Prepare
         id: prepare

.github/workflows/dockerimage.yml

@@ -6,7 +6,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - name: Build the Docker image
         run: |
           docker run -i $(docker build -q 12) /bin/sh -c "node --version && git --version"

.github/workflows/hadolint.yml

@@ -6,6 +6,6 @@ jobs:
   build:
     runs-on: macos-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - run: brew install hadolint
       - run: hadolint {12,14}/Dockerfile