Update actions/checkout action to v5

Author: renovate[bot]

.github/workflows/cd.yml

@@ -131,7 +131,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Start up postgresql docker container
         run: |

.github/workflows/check-renovatebot-config.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Validate
         uses: suzuki-shunsuke/[email protected]

.github/workflows/test-docker-compose.yml

@@ -12,7 +12,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Start postgres databases in docker-compose
         run: docker compose up -d