Bump actions/checkout from 6 to 7

Bumps [actions/checkout](https://github.com/actions/checkout) from 6 to 7.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v6...v7)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/docker.yml

@@ -38,7 +38,7 @@ jobs:
   download:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: ./.github/actions/downloads
 
   mirror:
@@ -104,7 +104,7 @@ jobs:
     needs: [mirror]
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: ./.github/actions/toolchain-downloads
 
       - name: Log in to GHCR
@@ -135,7 +135,7 @@ jobs:
     needs: [download, toolchain, mirror]
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: ./.github/actions/single-download
         with:
           shvr_shell: ${{ matrix.shell }}
@@ -1470,7 +1470,7 @@ jobs:
               zsh_5.0.8
               zsh_4.2.7
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Log in to GHCR
         uses: docker/login-action@v4

.github/workflows/workflow-verification.yml

@@ -18,7 +18,7 @@ jobs:
   verify-workflows:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - name: Check workflow permissions
         run: |
           set -e
@@ -38,7 +38,7 @@ jobs:
     runs-on: ubuntu-24.04
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: 'Download Verification'
         run: |