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

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>

.github/workflows/build.yml

@@ -10,7 +10,7 @@ jobs:
       MRUBY_CONFIG: ci/gcc-clang
       CC: gcc
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - name: Ruby version
         run: ruby -v
       - name: Compiler version
@@ -25,7 +25,7 @@ jobs:
       MRUBY_CONFIG: ci/gcc-clang
       CC: clang
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - name: Ruby version
         run: ruby -v
       - name: Compiler version
@@ -40,7 +40,7 @@ jobs:
       MRUBY_CONFIG: ci/gcc-clang
       CC: gcc
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - name: Ruby version
         run: ruby -v
       - name: Compiler version
@@ -55,7 +55,7 @@ jobs:
       MRUBY_CONFIG: ci/gcc-clang
       CC: clang
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - name: Ruby version
         run: ruby -v
       - name: Compiler version
@@ -70,7 +70,7 @@ jobs:
       MRUBY_CONFIG: ci/gcc-clang
       CC: clang
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - name: Ruby version
         run: ruby -v
       - name: Compiler version
@@ -85,7 +85,7 @@ jobs:
       MRUBY_CONFIG: ci/gcc-clang
       CC: gcc
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - name: Ruby version
         run: ruby -v
       - name: Compiler version
@@ -105,7 +105,7 @@ jobs:
       package-dir: C:\cygwin-package
       cache-version: v1
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - uses: actions/cache@v2.1.5
         with:
           path: ${{ env.package-dir }}
@@ -145,7 +145,7 @@ jobs:
     env:
       MRUBY_CONFIG: ci/msvc
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - name: Ruby version
         run: ruby -v
       - name: Build and test

.github/workflows/codeql-analysis.yml

@@ -13,7 +13,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
         with:
           # We must fetch at least the immediate parents so that if this is
           # a pull request then we can checkout the head.

.github/workflows/lint.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check Out
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
       - name: Install
         run: |
           wget -O - -q https://git.io/misspell | sh -s -- -b .
@@ -19,7 +19,7 @@ jobs:
     name: Merge Conflict
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - name: Check merge conflict
         run: |
           grep "^<<<<<<< HEAD" $(git ls-files | xargs) && exit 1 || true
@@ -27,6 +27,6 @@ jobs:
     name: Trailing whitespace
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - name: Check for trailing whitespace
         run: "! git grep -EIn $'[ \t]+$'"

.github/workflows/linter.yml

@@ -12,7 +12,7 @@ jobs:
     name: Lint Code Base
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - uses: github/super-linter@v3.17.0
         env:
           ERROR_ON_MISSING_EXEC_BIT: true