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

Author: renovate[bot]

.github/workflows/audit.yml

@@ -19,7 +19,7 @@ jobs:
     env:
       TAG: latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Manual Trivy Setup
         uses: aquasecurity/setup-trivy@v0.2.4
         with:

.github/workflows/release_image.yml

@@ -42,7 +42,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 

.github/workflows/test.yml

@@ -13,7 +13,7 @@ jobs:
   test:
     runs-on: "ubuntu-latest"
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ruby/setup-ruby@v1
       - run: "bundle install"
       - run: "bundle exec rake"

.github/workflows/update_gems.yml

@@ -34,7 +34,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - uses: ruby/setup-ruby@v1
         with: