chore: fix versions in GH workflow files

.github/workflows/check-dist.yml

@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v4
 
       - name: Set Node.js 20.x
         uses: actions/setup-node@v4

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
     name: Build & Test
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v4
       - run: node --version
       - run: npm ci
       - run: npm run build

.github/workflows/manual-run.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v4
       - run: npm ci
       - run: npm run build
       - run: npm test

.github/workflows/test-report.yml

@@ -11,7 +11,7 @@ jobs:
     name: Workflow test
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v4
     - uses: ./
       with:
         artifact: test-results