Bump actions/checkout from 2 to 2.3.4 (#749)

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](actions/checkout@v2...v2.3.4)

Signed-off-by: dependabot[bot] <[email protected]>

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -31,7 +31,7 @@ jobs:
         shell: bash
         working-directory: old
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v2.3.4
     - uses: actions/[email protected]
       name: Cache build artifact store
       with:
@@ -90,7 +90,7 @@ jobs:
         shell: bash
         working-directory: old
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v2.3.4
     - uses: actions/[email protected]
       name: Cache build artifact store
       with:

.github/workflows/vcpkg_ci_linux.yml

@@ -59,7 +59,7 @@ jobs:
 
     steps:
       # Used to get commit message since PRs are on a merge commit
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
         with:
           ref: ${{ github.event.after }}
           submodules: false
@@ -69,7 +69,7 @@ jobs:
           echo "$(git log --format=%B -n 1 ${{ github.event.after }})" >> "$GITHUB_ENV"
           echo "EOF" >> "$GITHUB_ENV"
 
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
         with:
           submodules: true
 

.github/workflows/vcpkg_ci_mac.yml

@@ -47,7 +47,7 @@ jobs:
 
     steps:
       # Used to get commit message since PRs are on a merge commit
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
         with:
           ref: ${{ github.event.after }}
           submodules: false
@@ -57,7 +57,7 @@ jobs:
           echo "$(git log --format=%B -n 1 ${{ github.event.after }})" >> "$GITHUB_ENV"
           echo "EOF" >> "$GITHUB_ENV"
 
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
         with:
           submodules: true
 

.github/workflows/vcpkg_ci_windows.yml

@@ -49,7 +49,7 @@ jobs:
       ARTIFACT_NAME: vcpkg_windows-vs2019_${{ matrix.llvm }}_amd64
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
         with:
           ref: ${{ github.event.after }}
           submodules: false
@@ -59,7 +59,7 @@ jobs:
           Add-Content -Path $env:GITHUB_ENV -Encoding UTF8 -Value "$(git log --format=%B -n 1 ${{ github.event.after }})"
           Add-Content -Path $env:GITHUB_ENV -Encoding UTF8 -Value 'EOF'
 
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
         with:
           submodules: true
 

.github/workflows/vcpkg_docker.yml

@@ -35,7 +35,7 @@ jobs:
       - name: Cleanup working directory with container root
         run: |
           docker run --rm -v $(pwd):/workspace -w /workspace ubuntu:latest find . -name . -o -prune -exec rm -rf -- {} + || true
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - name: Build and Push
         working-directory: docker
         run: |

.github/workflows/vcpkg_release.yml

@@ -10,7 +10,7 @@ jobs:
     name: Publish Release on GitHub
     runs-on: ubuntu-20.04
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v2.3.4
     - name: Create Release
       id: create_release
       uses: actions/[email protected]