chore(deps): 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] <[email protected]>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -25,7 +25,7 @@ jobs:
       docs: ${{ steps.filter.outputs.docs }}
       not-only-docs: ${{ steps.filter.outputs.not-only-docs }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: dorny/paths-filter@v3
         id: filter
         with:
@@ -44,7 +44,7 @@ jobs:
     if: ${{ !github.event.pull_request.draft }}
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Install Forge
         uses: input-output-hk/catalyst-forge/actions/install@ci/v1.10.0
         with:

.github/workflows/flutter-mobile-integration-test.yml

@@ -20,7 +20,7 @@ jobs:
     timeout-minutes: 30
     steps:
       - name: ⬇️ Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: ⤵️ Authenticate with Google Cloud Platform
         uses: "google-github-actions/auth@v2"

.github/workflows/flutter-publish-packages.yml

@@ -16,7 +16,7 @@ jobs:
     name: Publish Flutter Packages
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: subosito/flutter-action@v2
         with:
           channel: stable

.github/workflows/flutter-uikit-example-firebase-deploy.yml

@@ -19,7 +19,7 @@ jobs:
     name: Deploy UIKit example on Firebase Hosting
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Install Forge
         uses: input-output-hk/catalyst-forge/actions/install@ci/v1.10.0
         with:

.github/workflows/gateway-tests.yml

@@ -16,7 +16,7 @@ jobs:
     name: Cat-Gateway integration tests
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Free Disk Space (Ubuntu)
         uses: jlumbroso/free-disk-space@main

.github/workflows/generate-allure-report.yml

@@ -23,7 +23,7 @@ jobs:
     name: Generate test reports
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Install Forge
         uses: input-output-hk/catalyst-forge/actions/install@ci/v1.10.0
@@ -75,7 +75,7 @@ jobs:
     needs: generate-test-reports
     if: false && needs.generate-test-reports.result == 'success'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Free Disk Space (Ubuntu)
         uses: jlumbroso/free-disk-space@main
@@ -105,7 +105,7 @@ jobs:
           ls ${{ env.ALLURE_REPORT_FOLDER }}
 
       - name: Checkout gh-pages
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           ref: gh-pages
           path: gh-pages-dir
@@ -138,7 +138,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: generate-test-reports
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: actions/download-artifact@v4
         with:

.github/workflows/nightly-ci.yml

@@ -26,7 +26,7 @@ jobs:
     name: nightly tests
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Free Disk Space (Ubuntu)
         uses: jlumbroso/free-disk-space@main

.github/workflows/voices-tests.yml

@@ -17,7 +17,7 @@ jobs:
     name: Cat-Voices integration tests
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Free Disk Space (Ubuntu)
         uses: jlumbroso/free-disk-space@main