chore(deps): bump actions/checkout from 2 to 2.3.4 (#1964)

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>
Co-authored-by: Frederic Werner <20406381+wernerfred@users.noreply.github.com>
Co-authored-by: Georg Lauterbach <44545919+aendeavor@users.noreply.github.com>

.github/workflows/default_on_push.yml

@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
         with:
           submodules: recursive
       - name: Set up Docker Buildx
@@ -58,7 +58,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
         with:
           submodules: recursive
       - name: Prepare tags

.github/workflows/deploy-docs.yml

@@ -26,7 +26,7 @@ jobs:
     name: 'Deploy Docs'
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
 
       - name: 'Check if deploy is for a `v<major>.<minor>` tag version instead of `edge`'
         if: startsWith(github.ref, 'refs/tags/')
@@ -76,10 +76,10 @@ jobs:
     needs: deploy
     steps:
       - name: 'Checkout the tagged commit (shallow clone)'
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
 
       - name: 'Checkout the docs deployment branch to a subdirectory'
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
         with:
           ref: gh-pages
           path: gh-pages

.github/workflows/linting.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
         with:
           submodules: recursive
       - name: Hadolint

.github/workflows/pr-docs.yml

@@ -16,7 +16,7 @@ jobs:
     name: 'Verify Build'
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
 
       - name: 'Build with mkdocs-material via Docker'
         run: docker run --rm -v ${PWD}:/docs squidfunk/mkdocs-material:7.1.4 build --strict

.github/workflows/scheduled_builds.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
         with:
           ref: stable
           submodules: recursive

.github/workflows/test_merge_requests.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
         with:
           submodules: recursive
       - name: Build image locally