update all `actions/checkout` versions to v4

.github/workflows/acceptance.yml

@@ -17,7 +17,7 @@ jobs:
       has_change: ${{ steps.diff.outputs.has_change}}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - id: fetch-base
         if: github.event_name == 'pull_request'
@@ -74,7 +74,7 @@ jobs:
 
       - name: checkout
         if: ${{ needs.changes.outputs.has_change == 'true' }}
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       # Use Docker layer caching for 'docker build' and 'docker-compose build' commands.
       # https://github.com/satackey/action-docker-layer-caching/releases/tag/v0.0.11

.github/workflows/build.yml

@@ -19,7 +19,7 @@ jobs:
 
     steps:
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - uses: ruby/setup-ruby@250fcd6a742febb1123a77a841497ccaa8b9e939 # pin@v1.152.0
         with:

.github/workflows/codeql-analysis.yml

@@ -25,7 +25,7 @@ jobs:
 
     steps:
     - name: checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL

.github/workflows/lint.yml

@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - uses: ruby/setup-ruby@250fcd6a742febb1123a77a841497ccaa8b9e939 # pin@v1.152.0
         with:

.github/workflows/release.yml

@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - uses: ruby/setup-ruby@250fcd6a742febb1123a77a841497ccaa8b9e939 # pin@v1.152.0
         with:

.github/workflows/test.yml

@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - uses: ruby/setup-ruby@250fcd6a742febb1123a77a841497ccaa8b9e939 # pin@v1.152.0
         with:

lib/contracts-ruby2/.github/workflows/code_style_checks.yaml

@@ -26,7 +26,7 @@ jobs:
     runs-on: ${{ matrix.os }}-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Setup Ruby
         uses: ruby/setup-ruby@v1
         with:

lib/contracts-ruby2/.github/workflows/tests.yaml

@@ -37,7 +37,7 @@ jobs:
     runs-on: ${{ matrix.os }}-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Setup Ruby
         uses: ruby/setup-ruby@v1
         with:

lib/contracts-ruby3/.github/workflows/code_style_checks.yaml

@@ -26,7 +26,7 @@ jobs:
     runs-on: ${{ matrix.os }}-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Setup Ruby
         uses: ruby/setup-ruby@v1
         with:

lib/contracts-ruby3/.github/workflows/tests.yaml

@@ -29,7 +29,7 @@ jobs:
     runs-on: ${{ matrix.os }}-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Setup Ruby
         uses: ruby/setup-ruby@v1
         with: