Bump actions/checkout from 4 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/generate-dependabot.yml

@@ -14,7 +14,7 @@ jobs:
   generate:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Generate dependabot.yml
         uses: Makeshift/generate-dependabot-glob-action@5cd45385ce6519f68d574aab9699832b3a5e5031 # v1.3.4

.github/workflows/main.yml

@@ -16,7 +16,7 @@ jobs:
         ruby-version: ["2.6"]
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Build container
         run: docker build . --file Dockerfile --tag octocatalog-diff:ruby${{matrix.ruby-version}} --build-arg RUBY_VERSION=${{matrix.ruby-version}} --build-arg PUPPET_VERSION=${{env.PUPPET_VERSION}}
       - name: Tests
@@ -37,7 +37,7 @@ jobs:
         ruby-version: ["2.6"]
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Build container
         run: docker build . --file Dockerfile --tag octocatalog-diff:ruby${{matrix.ruby-version}} --build-arg RUBY_VERSION=${{matrix.ruby-version}} --build-arg PUPPET_VERSION=${{env.PUPPET_VERSION}}
       - name: Tests
@@ -58,7 +58,7 @@ jobs:
         ruby-version: ["2.6"]
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Build container
         run: docker build . --file Dockerfile --tag octocatalog-diff:ruby${{matrix.ruby-version}} --build-arg RUBY_VERSION=${{matrix.ruby-version}} --build-arg PUPPET_VERSION=${{env.PUPPET_VERSION}}
       - name: Tests
@@ -79,7 +79,7 @@ jobs:
         ruby-version: ["2.6"]
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Build container
         run: docker build . --file Dockerfile --tag octocatalog-diff:ruby${{matrix.ruby-version}} --build-arg RUBY_VERSION=${{matrix.ruby-version}} --build-arg PUPPET_VERSION=${{env.PUPPET_VERSION}}
       - name: Tests

.github/workflows/release.yml

@@ -13,7 +13,7 @@ jobs:
       packages: write
       contents: read
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Set up Ruby
         uses: ruby/setup-ruby@a6b46b8a08edb18935835849f2a17072d5cc8c73 # v1.192.0
         with: