chore(deps): update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/production.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Build image
         id: build-image
@@ -37,7 +37,7 @@ jobs:
     needs: build-and-push
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Pull image and create a container
         run: docker create --name riksutin quay.io/toska/riksutin:production

.github/workflows/staging.yml

@@ -13,7 +13,7 @@ jobs:
     needs: test
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Build image
         id: build-image

.github/workflows/test.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Build project for eslint
         run: npm ci
       - name: Run eslint
@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     - uses: actions/setup-node@v4
       with:
         node-version: 20